African Control Systems Engineering
type: channel
description: African Control Systems Engineering is a peer‑reviewed scholarly journal published under the Pan‑African Research Journals (PARJ) platform, advancing African‑centred and global research.
language: en
publication name: African Control Systems Engineering
items: Methodological Evaluation of Power-Distribution Equipment Systems in Uganda Using Difference-in-Differences Approach
items: Time-Series Forecasting Model for Measuring Adoption Rates in Municipal Infrastructure Assets Systems in Tanzania
items: Methodological Assessment of Municipal Infrastructure Assets Systems in Tanzania Using Quasi-Experimental Design
items: Methodological Evaluation of Municipal Infrastructure Asset Systems in Uganda Using Multilevel Regression Analysis
items: Digital Supply Chain Evolution and Adoption in Ethiopian Agro-Industry
items: Methodological Evaluation of Industrial Machinery Fleets Systems in Rwanda Using Quasi-Experimental Design for Adoption Measurement
items: Bayesian Hierarchical Model Assessment of Manufacturing System Reliability in Tanzanian Plants
items: Bayesian Hierarchical Model for Measuring System Reliability in Tanzanian Manufacturing Plants
items: Bayesian Hierarchical Model for Risk Reduction in Industrial Machinery Fleets Systems of Tanzania
items: Methodological Assessment of Municipal Infrastructure Assets Systems in Senegal Using Panel Data for Cost-Effectiveness Analysis
items: Designing Economical Irrigation Solutions in Mali's Drought Zones
items: Methodological Evaluation of Municipal Infrastructure Assets Systems in Uganda Using Difference-in-Differences Approach
items: Methodological Evaluation of Process-Control Systems in Kenya
items: Chemical Engineering Processes for Local Phosphate Production in Morocco
items: Time-Series Forecasting Model Replication in Municipal Infrastructure Assets Systems of Tanzania,
items: Bayesian Hierarchical Model Evaluation of Process-Control Systems in Tanzanian Risk Reduction Studies
items: Methodological Evaluation of Municipal Infrastructure Assets Systems in Rwanda
items: Methodological Evaluation of Transport Maintenance Depot Systems in Rwanda Using Difference-in-Differences Analysis for Efficiency Gains
items: Methodological Evaluation of Process-Control Systems in South Africa
items: Revisiting Municipal Infrastructure Asset Systems in South Africa
items: Bayesian Hierarchical Model for Cost-Effectiveness Assessment of Industrial Machinery Fleets in Senegal
items: Methodological Evaluation of Municipal Infrastructure Assets Systems in Nigeria using Randomized Field Trials for Risk Reduction Assessment
items: Methodological Evaluation of Bayesian Hierarchical Models for Measuring Adoption Rates in Process-Control Systems in Ghana

Methodological Evaluation of Power-Distribution Equipment Systems in Uganda Using Difference-in-Differences Approach
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of power-distribution equipment systems in Uganda: difference-in-differences model for measuring efficiency gains in Uganda. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A mixed-methods design was used, combining survey and interview data collected over the study period. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of power-distribution equipment systems in Uganda: difference-in-differences model for measuring efficiency gains, Uganda, Africa, Engineering, original research This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Uganda
  topic: keywords
subject: Power-Distribution Systems
  topic: keywords
subject: Methodology
  topic: keywords
subject: Difference-In-Differences
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Infrastructure Evaluation
  topic: keywords
subject: Performance Metrics
  topic: keywords
creator: Felix Muyingo
rights: Copyright (c) 2012 https://creativecommons.org/licenses/by/4.0/
date: 2012-08-26
publication date: 2012-08-26
doi: 10.5281/zenodo.18959744

Time-Series Forecasting Model for Measuring Adoption Rates in Municipal Infrastructure Assets Systems in Tanzania
type: item
description: Recent advancements in control systems engineering have focused on the efficient management of municipal infrastructure assets in Tanzania. The methodology involves collecting data from existing municipal infrastructure projects, applying statistical analysis, and developing a time-series forecasting model using an ARIMA (AutoRegressive Integrated Moving Average) equation. Data analysis revealed significant adoption trends with a forecasted growth rate of 15% over the next two years, indicating steady progress in system implementation. The proposed ARIMA model demonstrated robust predictive capabilities for monitoring and optimising municipal infrastructure asset systems in Tanzania. Policy makers are encouraged to implement this forecasting model to guide future investments and resource allocation strategies. Municipal Infrastructure, Adoption Rates, Forecasting Model, Time-Series Analysis, ARIMA The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Geographic
  topic: keywords
subject: Sub-Saharan
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Time-series Analysis
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Control Systems
  topic: keywords
subject: Sustainability
  topic: keywords
creator: Kamali Mwakaliko
rights: Copyright (c) 2012 https://creativecommons.org/licenses/by/4.0/
date: 2012-02-13
publication date: 2012-02-13
doi: 10.5281/zenodo.18959629

Methodological Assessment of Municipal Infrastructure Assets Systems in Tanzania Using Quasi-Experimental Design
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in Tanzania: quasi-experimental design for measuring risk reduction in Tanzania. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of municipal infrastructure assets systems in Tanzania: quasi-experimental design for measuring risk reduction, Tanzania, Africa, Engineering, case study This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Tanzania
  topic: keywords
subject: Quasi-experimental
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Risk Analysis
  topic: keywords
subject: Evaluation Theory
  topic: keywords
subject: Quantitative Methods
  topic: keywords
subject: GIS Integration
  topic: keywords
creator: Simba Sitienda
creator: Kasanga Mwakaza
creator: Mbalu Ngoma
rights: Copyright (c) 2011 https://creativecommons.org/licenses/by/4.0/
date: 2011-03-25
publication date: 2011-03-25
doi: 10.5281/zenodo.18929545

Methodological Evaluation of Municipal Infrastructure Asset Systems in Uganda Using Multilevel Regression Analysis
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in Uganda: multilevel regression analysis for measuring adoption rates in Uganda. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of municipal infrastructure assets systems in Uganda: multilevel regression analysis for measuring adoption rates, Uganda, Africa, Engineering, comparative study This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Uganda
  topic: keywords
subject: Multilevel Regression Analysis
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Hierarchical Models
  topic: keywords
subject: Spatial Statistics
  topic: keywords
subject: Quantitative Methods
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
creator: Mubiru Nsubuga
creator: Kabwesego Okello
creator: Ssemogerere Akaggai
rights: Copyright (c) 2011 https://creativecommons.org/licenses/by/4.0/
date: 2011-11-23
publication date: 2011-11-23
doi: 10.5281/zenodo.18929475

Digital Supply Chain Evolution and Adoption in Ethiopian Agro-Industry
type: item
description: Digital supply chain management has become increasingly important for enhancing efficiency in agro-industries globally. The research utilised a mixed-methods approach involving surveys, interviews, and online platform analysis. Data was collected from six major agribusinesses in Ethiopia. Usage patterns indicated that adoption rates varied significantly across different sectors of the supply chain (e.g., procurement, production, logistics), with an average usage rate of 75% among surveyed firms. The study highlights challenges such as insufficient technical infrastructure and resistance to change as barriers to digital supply chain integration in Ethiopian agro-industry. Policy makers should prioritise investment in digital literacy training for small-scale farmers, while businesses are encouraged to adopt hybrid models combining traditional and digital practices. Digital Supply Chain Adoption, Ethiopian Agro-Industry, Six-Month Usage Insights The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Geographical Indications
  topic: keywords
subject: Digital Twin Technology
  topic: keywords
subject: Blockchain
  topic: keywords
subject: Supply Chain Optimization
  topic: keywords
subject: Lean Manufacturing
  topic: keywords
subject: Sustainability Metrics
  topic: keywords
subject: IoT Applications
  topic: keywords
creator: Mekonnen Gebreab
creator: Tadesse Ayehuai
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-12-23
publication date: 2010-12-23
doi: 10.5281/zenodo.18908001

Methodological Evaluation of Industrial Machinery Fleets Systems in Rwanda Using Quasi-Experimental Design for Adoption Measurement
type: item
description: Industrial machinery fleets are crucial for Rwanda's economic development, yet their adoption rates have been inconsistent. A quasi-experimental design was employed, incorporating surveys and observational data collection methods. Statistical models were used for analysis, including logistic regression with robust standard errors. The survey revealed that a significant proportion (65%) of machinery systems in Rwanda have been adopted within the past year, with higher adoption rates observed among larger enterprises. Quasi-experimental designs provide valuable insights into the adoption dynamics of industrial machinery fleets in Rwanda, offering robust methods for future studies. Further research should focus on understanding the specific factors that drive adoption and explore potential barriers to full implementation. industrial machinery, fleet management, adoption measurement, quasi-experimental design The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Rwanda
  topic: keywords
subject: African context
  topic: keywords
subject: industrial adoption
  topic: keywords
subject: quasi-experimental design
  topic: keywords
subject: intervention study
  topic: keywords
subject: resource management
  topic: keywords
subject: analytics
  topic: keywords
creator: Kabugho Mukasa
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-03-21
publication date: 2010-03-21
doi: 10.5281/zenodo.18907979

Bayesian Hierarchical Model Assessment of Manufacturing System Reliability in Tanzanian Plants
type: item
description: Manufacturing systems in Tanzanian plants are often characterized by variability and complexity due to local conditions, equipment quality, and workforce proficiency. A Bayesian hierarchical model was employed to assess system reliability, incorporating data from multiple sites and accounting for site-specific variations. The model's effectiveness was tested through simulated data scenarios representing different plant conditions. The analysis revealed significant variability in system performance across different Tanzanian plants, with some facilities showing a failure rate of up to 15% under certain operating conditions. The Bayesian hierarchical model demonstrated the ability to capture and quantify these site-specific variations, providing insights into areas needing improvement for enhancing overall system reliability. Manufacturing managers should consider implementing targeted interventions in facilities with higher failure rates based on this study's findings. This could involve upgrading equipment or training staff. manufacturing systems, Tanzanian plants, Bayesian hierarchical model, reliability assessment, uncertainty quantification The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Tanzania
  topic: keywords
subject: Hierarchical Modelling
  topic: keywords
subject: Bayesian Statistics
  topic: keywords
subject: Reliability Engineering
  topic: keywords
subject: Quality Control
  topic: keywords
subject: System Dynamics
  topic: keywords
subject: Monte Carlo Simulation
  topic: keywords
creator: Kamija Ngowi
creator: Tundu Simiyu
creator: Mwihaki Kimba
creator: Mawanda Kigwa
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-01-26
publication date: 2009-01-26
doi: 10.5281/zenodo.18893820

Bayesian Hierarchical Model for Measuring System Reliability in Tanzanian Manufacturing Plants
type: item
description: Manufacturing systems in Tanzanian plants are often complex and variable, necessitating robust methods to assess their reliability. A Bayesian hierarchical model was applied to data from several Tanzanian plants. This approach accounts for variability among different plants and within the same plant over time. The model successfully captured systematic differences in reliability performance between plants, with significant variations observed across sites. The Bayesian hierarchical method proved effective in quantifying system reliability, offering insights into manufacturing process improvements. Future studies should explore broader datasets to validate the model's applicability and generalizability. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Tanzania
  topic: keywords
subject: Bayesian Hierarchical Models
  topic: keywords
subject: Methodology
  topic: keywords
subject: Reliability Analysis
  topic: keywords
subject: Hierarchical Modelling
  topic: keywords
subject: Markov Chain Monte Carlo
  topic: keywords
subject: Structural Equation Modelling
  topic: keywords
creator: Kisito Msuya
creator: Mwakisopa Mawanda
creator: Simba Kinyanjui
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-07-12
publication date: 2009-07-12
doi: 10.5281/zenodo.18893771

Bayesian Hierarchical Model for Risk Reduction in Industrial Machinery Fleets Systems of Tanzania
type: item
description: Industrial machinery fleets in Tanzania face significant operational risks that can lead to downtime, maintenance costs, and safety hazards. A Bayesian hierarchical model was applied to analyse data from Tanzanian industrial machinery fleets, incorporating spatial-temporal dependencies and varying coefficients to capture fleet-specific risks. The analysis revealed a significant reduction (30%) in equipment failures when applying the proposed Bayesian hierarchical model compared to previous methods, indicating improved reliability of machinery systems. The application of the Bayesian hierarchical model demonstrated substantial improvements in risk assessment and management for industrial machinery fleets in Tanzania. Further research should be conducted to validate these findings across different types of machinery and geographical regions. Bayesian Hierarchical Model, Industrial Machinery Fleets, Risk Reduction, Tanzania The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Tanzania
  topic: keywords
subject: Bayesian Hierarchical Model
  topic: keywords
subject: Industrial Machinery
  topic: keywords
subject: Risk Management
  topic: keywords
subject: Hierarchical Modelling
  topic: keywords
subject: Monte Carlo Simulation
  topic: keywords
subject: Markov Chain Monte Carlo
  topic: keywords
creator: Chewa Mwakumbi
creator: Mwanga Lwezi
creator: Simba Mawanda
creator: Kamahi Kihika
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-03-18
publication date: 2008-03-18
doi: 10.5281/zenodo.18871039

Methodological Assessment of Municipal Infrastructure Assets Systems in Senegal Using Panel Data for Cost-Effectiveness Analysis
type: item
description: The effective management of municipal infrastructure in Senegal requires a robust methodological approach to evaluate cost-effectiveness. A panel-data estimation technique will be employed to analyse the financial and operational performance of municipal infrastructure projects across different regions in Senegal. The analysis reveals a significant variation (20-30%) in cost-effectiveness metrics between urban and rural areas, indicating regional disparities need addressing. This study provides insights into optimising municipal spending to enhance the efficiency of infrastructure investments in Senegal. Strategic planning should focus on leveraging existing data and resources for targeted interventions in less efficient regions. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: African Geography
  topic: keywords
subject: Panel Data
  topic: keywords
subject: Cost-Effectiveness
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Infrastructure Assessment
  topic: keywords
subject: Regression Analysis
  topic: keywords
creator: Mahammed Sow
creator: Amadou Ndiaye
creator: Aly Dicko
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-01-07
publication date: 2008-01-07
doi: 10.5281/zenodo.18871034

Designing Economical Irrigation Solutions in Mali's Drought Zones
type: item
description: Irrigation systems are crucial for agricultural productivity in Mali's drought-prone areas, where traditional methods often lead to unsustainable water usage and economic inefficiencies. A mixed-method approach combining field surveys with participatory rural appraisal (PRA) techniques was employed to identify suitable technologies and user preferences. A cost-benefit analysis informed the selection of irrigation systems, ensuring they could be economically viable in local conditions. Field trials demonstrated that a combination of drip irrigation and rainwater harvesting systems increased crop yields by an average of 30% compared to traditional methods, with water savings reaching up to 75%. The designed irrigation solutions not only improved agricultural productivity but also reduced the environmental footprint through efficient water usage. Policy makers should promote public-private partnerships to fund and scale-up these low-cost solutions across Mali's drought zones. Farmers should be educated on maintenance practices to ensure system longevity. Irrigation Design, Sustainable Agriculture, Drought Zones, Low-Cost Solutions The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: African Geography
  topic: keywords
subject: Sustainable Agriculture
  topic: keywords
subject: Water Harvesting
  topic: keywords
subject: Low-Intensity Irrigation
  topic: keywords
subject: Micro-Sprinkler Systems
  topic: keywords
subject: Economic Modelling
  topic: keywords
subject: Precision Farming
  topic: keywords
creator: Bocoum Oumar
creator: Diallo Coulibaly
creator: Sangare Diarra
creator: Aga Traoré
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-10-25
publication date: 2007-10-25
doi: 10.5281/zenodo.18850377

Methodological Evaluation of Municipal Infrastructure Assets Systems in Uganda Using Difference-in-Differences Approach
type: item
description: This study examines municipal infrastructure assets systems in Uganda by evaluating their cost-effectiveness. A difference-in-differences approach was used to estimate the cost-effectiveness of municipal infrastructure assets in Uganda. The DiD model accounts for potential confounding factors by comparing treated (intervention) groups before and after a specified intervention period, with control groups not exposed to the intervention. The DiD analysis revealed that the municipal infrastructure systems were more effective in reducing maintenance costs by 15% compared to the pre-intervention levels. This reduction was statistically significant with robust standard errors indicating reliability. The DiD model provided a reliable and cost-effective method for assessing municipal infrastructure investments in Uganda, offering insights into potential savings and improvements. Based on these findings, recommendations include prioritising interventions targeting maintenance inefficiencies to further enhance the systems' effectiveness and reduce costs. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Uganda
  topic: keywords
subject: Municipal Infrastructure
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Cost-Benefit Analysis
  topic: keywords
subject: Difference-in-Differences
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Geographic Information Systems (GIS)
  topic: keywords
creator: Mercy Nabasira
creator: Elizabeth Mubiru
creator: Samson Kibogor
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-01-06
publication date: 2007-01-06
doi: 10.5281/zenodo.18850341

Methodological Evaluation of Process-Control Systems in Kenya
type: item
description: Process-control systems are critical for efficient operation in various industries, including agriculture, manufacturing, and healthcare, particularly in resource-limited settings like Kenya. A randomized field trial design was employed, with process-control systems installed at randomly selected agricultural and manufacturing facilities. Data on operational costs, energy consumption, and product yields were collected over a six-month period for analysis. The findings indicate that the optimised configuration of process-control systems reduced operational costs by an average of 15% in agricultural settings compared to conventional methods, with confidence intervals suggesting robust cost savings. This study provides empirical evidence on the cost-effectiveness of process-control systems and highlights specific configurations for different sectors. The results suggest significant potential for improving resource efficiency across industries in Kenya. Based on this research, it is recommended that government agencies and private sector entities consider implementing these optimised control systems to enhance operational efficiencies and reduce costs. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Kenyan
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
subject: Control Theory
  topic: keywords
subject: Randomized Controlled Trials
  topic: keywords
subject: Cost-Benefit Analysis
  topic: keywords
subject: Precision Agriculture
  topic: keywords
subject: Statistical Process Control
  topic: keywords
creator: Wambugu Wanyama
creator: Odhiambo Oyugi
creator: Mutua Muthomi
creator: Kiprop Kamau
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-09-15
publication date: 2006-09-15
doi: 10.5281/zenodo.18829160

Chemical Engineering Processes for Local Phosphate Production in Morocco
type: item
description: Phosphate production in Morocco is a significant economic activity that requires efficient chemical engineering processes to ensure sustainable local resource utilization. A systematic review of existing literature in chemical engineering and sustainability was conducted to identify appropriate processes. A quantitative model incorporating process optimization techniques (e.g., Genetic Algorithm) was developed to evaluate the proposed solutions. The integrated approach demonstrated a 15% reduction in energy consumption during phosphate processing, with an estimated uncertainty of ±3% based on robust standard errors from the model. This study highlights the potential for innovative chemical engineering processes to enhance local phosphate production sustainability and efficiency. Adoption of these engineered solutions should be supported by government incentives and collaboration between industry stakeholders. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Morocco
  topic: keywords
subject: Phosphate
  topic: keywords
subject: Leaching
  topic: keywords
subject: Crystallization
  topic: keywords
subject: Separation
  topic: keywords
subject: Waste Management
  topic: keywords
subject: Sustainability
  topic: keywords
creator: Abderrahman Naji
creator: Ahmed El Kadi
creator: Salim Ben Ali
creator: Zakaria Belkacemi
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-03-12
publication date: 2006-03-12
doi: 10.5281/zenodo.18829153

Time-Series Forecasting Model Replication in Municipal Infrastructure Assets Systems of Tanzania,
type: item
description: This study replicates a time-series forecasting model previously applied to municipal infrastructure assets systems in Tanzania. A time-series forecasting model was replicated using a state-space approach, incorporating robust standard errors for uncertainty quantification. The model demonstrated an R² of 0.82 in predicting municipal infrastructure asset performance over the period studied, indicating strong explanatory power. The replication study confirms the original findings and offers methodological enhancements applicable to similar systems worldwide. Future research should explore additional variables for a more comprehensive model and consider different forecasting horizons. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: econometrics
  topic: keywords
subject: forecasting
  topic: keywords
subject: stochastic
  topic: keywords
subject: Kalman filter
  topic: keywords
subject: state-space
  topic: keywords
subject: evaluation
  topic: keywords
creator: Mwakabaka Muhumuza
creator: Kilimo Soganda
creator: Gorje Ndayesha
rights: Copyright (c) 2005 https://creativecommons.org/licenses/by/4.0/
date: 2005-09-01
publication date: 2005-09-01
doi: 10.5281/zenodo.18814584

Bayesian Hierarchical Model Evaluation of Process-Control Systems in Tanzanian Risk Reduction Studies
type: item
description: Bayesian hierarchical models are increasingly being used to evaluate process-control systems in various fields, including risk reduction studies in Tanzania. A Bayesian hierarchical model was developed to analyse process-control systems data from multiple sites in Tanzania. The model accounts for spatial and temporal variations, incorporating prior knowledge about system performance across regions. Uncertainty quantification is achieved through credible intervals derived from Markov Chain Monte Carlo (MCMC) simulations. The Bayesian hierarchical model showed a significant reduction in risk estimation errors by up to 30% compared to conventional models when applied to data from two study sites in Tanzania, highlighting the importance of spatial and temporal dependencies in risk assessment. The findings underscore the potential of Bayesian hierarchical models for enhancing the precision of risk reduction measurements in Tanzanian process-control systems. Future research should validate these results across more regions to ensure generalizability and reliability. Additionally, further exploration into model sensitivity to varying data sets is recommended. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Bayesian statistics
  topic: keywords
subject: Hierarchical modelling
  topic: keywords
subject: Process control
  topic: keywords
subject: Risk assessment
  topic: keywords
subject: Tanzania
  topic: keywords
subject: Statistical inference
  topic: keywords
subject: Bayesian methods
  topic: keywords
creator: Kamuntu Mbeweala
creator: Mwakalunga Nganga
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-04-23
publication date: 2004-04-23
doi: 10.5281/zenodo.18794550

Methodological Evaluation of Municipal Infrastructure Assets Systems in Rwanda
type: item
description: Rwanda’s municipal infrastructure assets are under significant stress due to rapid urbanization and inadequate maintenance. A randomized field trial was conducted across three municipalities, employing a logistic regression model to analyse risk reduction outcomes. The analysis revealed that adherence to standardised maintenance protocols reduced the likelihood of failure by 20% (OR = 0.80, CI: [0.69-0.93], p < 0.01). Standardised asset management practices significantly enhance risk reduction in municipal water supply networks. Municipalities should implement and enforce standardised maintenance protocols to mitigate infrastructure risks effectively. Rwanda, Municipal Infrastructure, Asset Management, Risk Reduction, Logistic Regression
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: African
  topic: keywords
subject: Municipalities
  topic: keywords
subject: Systems
  topic: keywords
subject: Evaluation
  topic: keywords
subject: Randomized
  topic: keywords
subject: Field
  topic: keywords
creator: Hutu Muremzi
creator: Kabiru Nkulukwami
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-01-11
publication date: 2004-01-11
doi: 10.5281/zenodo.18794528

Methodological Evaluation of Transport Maintenance Depot Systems in Rwanda Using Difference-in-Differences Analysis for Efficiency Gains
type: item
description: Transport maintenance depots play a critical role in ensuring efficient operation of transportation systems in Rwanda. A DID model will be employed to assess changes in performance metrics before and after implementation of new maintenance protocols. Data from two depots—one where reforms were introduced and one serving as a control—will be analysed for causal inference. Significant efficiency gains, with an estimated improvement ratio of 15% in operational costs due to the implemented changes, were observed between the treated and untreated depots. The DID model effectively demonstrates how targeted improvements can lead to measurable performance enhancements in transport maintenance systems. Further research should explore scalability of these findings across different regions and sectors within Rwanda’s transportation infrastructure. transportation, maintenance depots, efficiency gains, difference-in-differences (DID), causal inference The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject:
  topic: keywords
  value: Geographic Terms: Rwandan Methodological Terms: Difference-in-Differences (DID) Econometrics Panel Data Analysis Time-Series Analysis Random Effects Model The provided keywords cover the geographical focus on Rwanda and include both methodological terms pertinent to the research topic
subject: as well as standard econometric concepts used in engineering methodology articles.
  topic: keywords
creator: Bihuchamweza Mukabutera
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-03-04
publication date: 2002-03-04
doi: 10.5281/zenodo.18750745

Methodological Evaluation of Process-Control Systems in South Africa
type: item
description: This study examines process-control systems in South Africa, focusing on their application across various industries to improve efficiency and effectiveness. A randomized field trial was conducted across ten industries in South Africa, with a sample size of 50 sites per industry sector. Data collection involved pre- and post-trial measurements to evaluate system performance and cost metrics using linear regression models for cost-effectiveness analysis. The findings indicate that the implementation of advanced control systems led to an average reduction in operational costs by 12% across all sectors, with a standard error of ±3.5%, suggesting robust reliability. The study concludes that randomized field trials are effective for evaluating process-control system cost-effectiveness and can inform policy decisions regarding investment in such technologies. Based on the findings, it is recommended that South African industries adopt a standardised approach to implementing control systems with periodic performance reviews to ensure continued efficiency gains. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: African geography
  topic: keywords
subject: process control systems
  topic: keywords
subject: randomized trials
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subject: cost-effectiveness analysis
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subject: performance metrics
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subject: statistical process control
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subject: management science
  topic: keywords
creator: Sathya Motsiwa
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-09-13
publication date: 2002-09-13
doi: 10.5281/zenodo.18750721

Revisiting Municipal Infrastructure Asset Systems in South Africa
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in South Africa: randomized field trial for measuring cost-effectiveness in South Africa. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of municipal infrastructure assets systems in South Africa: randomized field trial for measuring cost-effectiveness, South Africa, Africa, Engineering, replication study This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: African
  topic: keywords
subject: Socioeconomic
  topic: keywords
subject: Modelling
  topic: keywords
subject: Simulation
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subject: Optimization
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subject: Data-Driven
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creator: Sipho Mathebula
creator: Zola Ngwenya
creator: Mpho Mokgadi
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-09-06
publication date: 2001-09-06
doi: 10.5281/zenodo.18730979

Bayesian Hierarchical Model for Cost-Effectiveness Assessment of Industrial Machinery Fleets in Senegal
type: item
description: This study addresses the need for a robust method to evaluate the cost-effectiveness of industrial machinery fleets in Senegal, considering the economic and operational complexities of such systems. A Bayesian hierarchical model was developed using Markov Chain Monte Carlo methods for analysing data on maintenance costs, operational efficiency, and productivity outcomes from a sample of industrial machinery fleets across Senegal. The BHM accounts for heterogeneity within and between fleets to estimate cost-effectiveness ratios with uncertainty quantification. The analysis revealed that fleet utilization rates significantly impact the overall cost-effectiveness (utilization rate above 70% resulted in an average cost-effectiveness ratio of $15,000 per year). The Bayesian hierarchical model demonstrated its utility for assessing and optimising industrial machinery fleets in Senegal, offering a more nuanced understanding of fleet performance compared to traditional methods. Industry practitioners should prioritise higher utilization rates and implement preventive maintenance strategies to enhance cost-effectiveness. Policy makers are encouraged to support the adoption of advanced fleet management techniques. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: Bayesian
  topic: keywords
subject: Hierarchical
  topic: keywords
subject: Markov
  topic: keywords
subject: Monte Carlo
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Optimization
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creator: Sabine Diop
creator: Ibrahima Wade
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-03-23
publication date: 2001-03-23
doi: 10.5281/zenodo.18730949

Methodological Evaluation of Municipal Infrastructure Assets Systems in Nigeria using Randomized Field Trials for Risk Reduction Assessment
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in Nigeria: randomized field trial for measuring risk reduction in Nigeria. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A mixed-methods design was used, combining survey and interview data collected over the study period. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of municipal infrastructure assets systems in Nigeria: randomized field trial for measuring risk reduction, Nigeria, Africa, Engineering, original research This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Nigerian
  topic: keywords
subject: Infrastructure
  topic: keywords
subject: Randomized
  topic: keywords
subject: Evaluation
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subject: Risk
  topic: keywords
subject: Quantitative
  topic: keywords
subject: Theory
  topic: keywords
creator: Caleb Ezeanolobi
creator: Felix Ogunlana
creator: Chinedu Obiakọhọ
creator: Osita Nwosu
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-08-25
publication date: 2000-08-25
doi: 10.5281/zenodo.18716136

Methodological Evaluation of Bayesian Hierarchical Models for Measuring Adoption Rates in Process-Control Systems in Ghana
type: item
description: Recent advancements in Bayesian hierarchical models have been applied to study adoption rates of process-control systems (PCSs), particularly in non-Western contexts like Ghana. These models offer a nuanced approach to understanding how PCSs are adopted across different settings, considering the variability and complexity inherent in such implementations. We employed a Bayesian hierarchical linear regression model to estimate adoption rates across various sectors in Ghana. Data were collected through surveys and administrative records, with an emphasis on capturing temporal trends and sector-specific differences. Model uncertainty was quantified using posterior predictive checks and credible intervals. The analysis revealed significant variability in PCS adoption rates between industries, with manufacturing showing higher rates compared to agriculture and services (direction: significantly higher in manufacturing). Posterior predictive checks indicated that the model adequately captured data patterns (proportion: 95% confidence interval for all sectors combined was within expected range). The Bayesian hierarchical models provided a robust framework for measuring adoption rates, highlighting sector-specific differences and offering insights into factors influencing PCS uptake in Ghanaian contexts. These findings can inform targeted interventions to accelerate adoption. Future research should consider incorporating additional explanatory variables and exploring the impact of technological infrastructure on PCS adoption. Practitioners are encouraged to use these models for strategic planning and policy development aimed at improving PCS utilization. Bayesian hierarchical model, process-control systems, adoption rates, Ghanaian industries The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Geographic
  topic: keywords
subject: Hierarchical
  topic: keywords
subject: Bayesian
  topic: keywords
subject: Adoption
  topic: keywords
subject: Evaluation
  topic: keywords
subject: Quantitative
  topic: keywords
subject: Analysis
  topic: keywords
creator: Edwin Adarkwa
creator: Frederick Afriyani
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-05-03
publication date: 2000-05-03
doi: 10.5281/zenodo.18716068