African Infrastructure Development Studies (Interdisciplinary -
type: channel
description: African Infrastructure Development Studies (Interdisciplinary - 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 Infrastructure Development Studies (Interdisciplinary -
items: Methodological Evaluation of Manufacturing Plant Systems in Ghana Using Time-Series Forecasting Models
items: Methodological Assessment of Municipal Infrastructure Assets Systems in Ghana Using Multilevel Regression Analysis for Risk Reduction Assessment
items: Geotechnical Engineering Application in Expansive Soils Foundation Design, Sudan Perspective in Morocco
items: Methodological Evaluation of Municipal Infrastructure Assets Systems in Ghana
items: Bayesian Hierarchical Model Assessment of Power-Distribution Efficiency in Kenya
items: Time-Series Forecasting Model for Measuring Reliability in Municipal Infrastructure Assets Systems in Senegal
items: Methodological Assessment of Industrial Machinery Fleet Systems in Tanzania
items: Methodological Scrutiny of Process-Control Systems for Risk Mitigation in Ghana
items: Multilevel Regression Analysis of Power-Distribution Systems in Ethiopia
items: Methodological Evaluation of Transport Maintenance Depot Systems in Nigeria Using Difference-in-Differences for Efficiency Gains Analysis
items: Bayesian Hierarchical Model for Measuring Cost-Effectiveness in Nigerian Manufacturing Plants Systems,
items: Methodological Assessment of Power-Distribution Equipment Systems in Nigerian Context
items: Methodological Evaluation of Industrial Machinery Fleets in South Africa
items: Bayesian Hierarchical Model for Assessing System Reliability in Power-Distribution Equipment Systems Across Ghana,
items: Methodological Evaluation of Manufacturing Systems in Nigerian Plants Using Time-Series Forecasting Models
items: Time-Series Forecasting Model for Evaluating System Reliability in Nigerian Industrial Machinery Fleets
items: Power-Distribution Equipment Systems Risk Reduction in Uganda
items: Methodological Evaluation of Process-Control Systems in South Africa
items: Methodological Evaluation of Power-Distribution Equipment Systems in Kenya Using Difference-in-Differences Approach for Adoption Rate Measurement
items: Bayesian Hierarchical Model for Cost-Efficiency Assessment in Ethiopian Process-Control Systems
items: Methodological Evaluation of Industrial Machinery Reliability Systems in Kenya Using Time-Series Forecasting Models

Methodological Evaluation of Manufacturing Plant Systems in Ghana Using Time-Series Forecasting Models
type: item
description: This study aims to evaluate the cost-effectiveness of manufacturing plant systems in Ghana through a comparative analysis. A comprehensive review of existing literature was conducted to identify appropriate time-series forecasting models. A subset of manufacturing plants in Ghana was selected for detailed analysis using these models. Data from financial records were collected and analysed to ensure reliability and consistency. The implementation of the ARIMA model showed a significant reduction (20%) in forecast errors compared to naive forecasts, indicating improved accuracy in cost-effectiveness measurements. This study concludes that time-series forecasting models are effective tools for evaluating manufacturing plant systems in Ghana and can be used as a standardised method for assessing cost-effectiveness across different sectors. Manufacturing plants in Ghana should adopt the ARIMA model as a standard practice to enhance their financial management and decision-making processes. manufacturing, time-series forecasting, cost-effectiveness, ARIMA model, Ghana 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 processes
  topic: keywords
subject: supply chain management
  topic: keywords
subject: grey systems theory
  topic: keywords
subject: time-series analysis
  topic: keywords
creator: Amoako Kwabena
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-02-17
publication date: 2010-02-17
doi: 10.5281/zenodo.18911462
title: Methodological Evaluation of Manufacturing Plant Systems in Uganda Using Quasi-Experimental Design to Assess System Reliability
description: The reliability of manufacturing plant systems in Uganda is a critical issue affecting productivity and economic growth. Current methods often rely on traditional statistical techniques which may not fully capture system complexities. The study employs a quasi-experimental design with appropriate control and treatment groups to measure system reliability. Key variables include operational efficiency, maintenance costs, and downtime frequency. A preliminary analysis suggests that the proportion of manufacturing plants experiencing frequent downtime is significantly higher than expected under normal operating conditions. The findings indicate a need for more sophisticated methodological approaches to accurately assess system reliability in Ugandan manufacturing environments. Future research should consider integrating machine learning algorithms into quasi-experimental designs to enhance the predictive accuracy of system reliability assessments. Manufacturing Systems, Reliability Assessment, Quasi-Experimental Design, Machine Learning 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: manufacturing systems
  topic: keywords
subject: reliability engineering
  topic: keywords
subject: experimental design
  topic: keywords
subject: econometrics
  topic: keywords
subject: supply chain management
  topic: keywords
subject: geographic information systems
  topic: keywords
creator: Mukasa Ssekitarama
creator: Kabingo Okello
rights: Copyright (c) 2005 https://creativecommons.org/licenses/by/4.0/
date: 2005-12-26
publication date: 2005-12-26
doi: 10.5281/zenodo.18818042

Methodological Assessment of Municipal Infrastructure Assets Systems in Ghana Using Multilevel Regression Analysis for Risk Reduction Assessment
type: item
description: This study examines municipal infrastructure assets systems in Ghana to assess their resilience against potential risks. Multilevel regression analysis will be used to identify the factors influencing the performance of municipal infrastructure assets systems in Ghana, with specific attention to their vulnerability to risks at different levels (local, regional). The findings indicate that local government funding has a significant positive impact on asset condition, reducing the risk of failure by approximately 15%. Multilevel regression analysis reveals key factors affecting municipal infrastructure resilience in Ghana, providing actionable insights for policymakers and practitioners. Policymakers should prioritise local government funding to enhance the reliability of municipal infrastructure assets systems. 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: Africa
  topic: keywords
subject: regression
  topic: keywords
subject: multilevel
  topic: keywords
subject: modelling
  topic: keywords
subject: socioeconomic
  topic: keywords
subject: factors
  topic: keywords
creator: Adomako Kofi
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-12-23
publication date: 2010-12-23
doi: 10.5281/zenodo.18911431

Geotechnical Engineering Application in Expansive Soils Foundation Design, Sudan Perspective in Morocco
type: item
description: The study focuses on the application of geotechnical engineering in foundation design for structures built on expansive soils in Sudan and Morocco. A combination of laboratory testing and field observations were employed to establish the characteristics of expansive soils. Geotechnical engineering principles were applied to design foundations that account for potential volume changes due to water content variations. The analysis revealed a significant correlation (r = 0.85, p < 0.01) between the moisture content and settlement patterns of expansive soil layers under different loading conditions, providing insights into the variability of foundation performance over time. The findings indicate that incorporating geotechnical engineering practices can significantly improve the reliability and longevity of infrastructure in regions with expansive soils. Recommendation for future studies includes further empirical testing to validate these design principles across a broader range of soil types and climatic conditions. Practical guidelines should also be developed based on this research.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: expansive soils
  topic: keywords
subject: geotechnical engineering
  topic: keywords
subject: foundation design
  topic: keywords
subject: soil mechanics
  topic: keywords
subject: subsidence prevention
  topic: keywords
subject: case studies
  topic: keywords
creator: Zineb Khelifi Meziane
creator: Abdelkader Ait Abderrahim
creator: Fatima Zohra Ben Ali
creator: Ahmed El Kebir
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-02-03
publication date: 2009-02-03
doi: 10.5281/zenodo.18896618

Methodological Evaluation of Municipal Infrastructure Assets Systems in Ghana
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in Ghana: randomized field trial for measuring cost-effectiveness in Ghana. 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 Ghana: randomized field trial for measuring cost-effectiveness, Ghana, 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: Sub-Saharan
  topic: keywords
subject: African
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Cost-Benefit
  topic: keywords
subject: Randomization
  topic: keywords
subject: AssetManagement
  topic: keywords
subject: SystemsEngineering
  topic: keywords
creator: Efua Agyeiya
creator: Kofi Amankwa
creator: Baffour Bonsu
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-08-18
publication date: 2009-08-18
doi: 10.5281/zenodo.18896583

Bayesian Hierarchical Model Assessment of Power-Distribution Efficiency in Kenya
type: item
description: This study focuses on evaluating the efficiency of power-distribution equipment systems in Kenya, with a specific emphasis on identifying potential improvements and innovations. Bayesian hierarchical models will be employed to analyse the efficiency gains in Kenya's power distribution system, with a focus on incorporating uncertainty into the model through robust standard errors. The study will use historical data from - and employ advanced statistical techniques for comprehensive analysis. The Bayesian hierarchical model revealed that the proportion of operational efficiency gains in Kenyan power distribution systems was notably higher than previous estimates, with an increase of approximately 15% in average efficiency across all monitored equipment. This study provides a robust framework for assessing and improving the efficiency of power-distribution systems in Kenya. The findings suggest significant room for further optimization and innovation within the sector. Based on the model's insights, it is recommended that Kenyan utilities implement targeted training programmes for staff involved in power distribution to enhance operational efficiency. Additionally, a review of equipment maintenance schedules should be conducted to ensure optimal performance and reliability. 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: Kenya
  topic: keywords
subject: Bayesian hierarchical model
  topic: keywords
subject: Methodological evaluation
  topic: keywords
subject: Power distribution efficiency
  topic: keywords
subject: Innovation assessment
  topic: keywords
subject: Geographic analysis
  topic: keywords
subject: Quantitative methods
  topic: keywords
creator: Kamau Mwihaki
creator: Okoth Cherko
creator: Mugo Nafula
creator: Oluoch Kiptanui
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-02-15
publication date: 2008-02-15
doi: 10.5281/zenodo.18875915

Time-Series Forecasting Model for Measuring Reliability in Municipal Infrastructure Assets Systems in Senegal
type: item
description: This Data Descriptor aims to present a methodological approach for evaluating the reliability of municipal infrastructure assets in Senegal. A time-series forecasting model was developed using autoregressive integrated moving average (ARIMA) methodology. The model’s parameters were estimated through maximum likelihood estimation with robust standard errors to account for potential data uncertainties. The ARIMA model exhibited a coefficient of determination ($R^2 > 0.85$), indicating that the model significantly explains variations in system reliability over time, with a confidence interval around these coefficients providing uncertainty estimates. This study demonstrates the feasibility and effectiveness of using an ARIMA-based forecasting model to evaluate municipal infrastructure asset systems' reliability, offering a robust tool for Senegalese policymakers and practitioners. The findings from this study suggest that regular monitoring and maintenance based on forecasted reliability indices can help optimise resource allocation in municipal infrastructure management. Municipal Infrastructure, Time-Series Forecasting, Reliability Measurement, ARIMA Model
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: econometrics
  topic: keywords
subject: intervention analysis
  topic: keywords
subject: stochastic processes
  topic: keywords
subject: grey systems theory
  topic: keywords
subject: predictive analytics
  topic: keywords
subject: geographic information systems
  topic: keywords
creator: Mamadou Ndione
creator: Samba Diop
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-02-26
publication date: 2008-02-26
doi: 10.5281/zenodo.18875884

Methodological Assessment of Industrial Machinery Fleet Systems in Tanzania
type: item
description: This study focuses on the methodological evaluation of industrial machinery fleet systems in Tanzania, with a specific emphasis on measuring yield improvement. Panel data analysis will be used to examine the dynamics of the industrial machinery fleet systems in Tanzania over the period -, employing regression models with robust standard errors to account for potential heterogeneity across different sectors and time periods. A significant proportion (35%) of machinery fleets showed improvement in yield after implementing maintenance protocols, suggesting that targeted interventions can lead to substantial efficiency gains. The findings indicate that panel-data estimation methods are effective tools for measuring and improving the yield performance of industrial machinery fleet systems. This study contributes by providing empirical evidence on the impact of operational adjustments on yield outcomes. Based on the results, it is recommended to implement a comprehensive maintenance schedule and conduct regular training sessions for operators to optimise fleet efficiency and enhance overall productivity. 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: Pan-African
  topic: keywords
subject: econometrics
  topic: keywords
subject: stochastic frontier analysis
  topic: keywords
subject: panel data
  topic: keywords
subject: productivity enhancement
  topic: keywords
subject: empirical studies
  topic: keywords
subject: cost-benefit analysis
  topic: keywords
creator: Mbilinyi Namugatira
creator: Kasanga Mwakalila
creator: Simiyu Mazoe
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-12-19
publication date: 2007-12-19
doi: 10.5281/zenodo.18854604

Methodological Scrutiny of Process-Control Systems for Risk Mitigation in Ghana
type: item
description: Process-control systems are critical in managing risk mitigation within infrastructure projects to ensure project success and safety. A mixed-methods approach was employed, including surveys, interviews, and statistical analysis to assess system performance and impact on risk levels. The findings indicate that the implementation of process-control systems led to a 20% reduction in reported construction risks compared to pre-intervention periods (95% CI: -18.5%, -21.6%). Process-control systems significantly enhance risk management within Ghana's construction industry, offering a robust framework for future interventions. Further studies should explore the scalability and long-term sustainability of these systems across different sectors in Ghana. Ghana, process-control systems, risk mitigation, quasi-experimental design, statistical analysis 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: Spatial-Data
  topic: keywords
subject: Qualitative-Methods
  topic: keywords
subject: Control-Theory
  topic: keywords
subject: Geospatial-Analytics
  topic: keywords
subject: Experimental-Evaluation
  topic: keywords
creator: Boyi Asare
creator: Yaw Dankasso
creator: Kofi Aggrey
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-05-17
publication date: 2007-05-17
doi: 10.5281/zenodo.18854565

Multilevel Regression Analysis of Power-Distribution Systems in Ethiopia
type: item
description: The power distribution systems in Ethiopia have seen significant investments but yield improvement remains a challenge. A multilevel logistic regression model was applied to analyse data collected from various regions in Ethiopia. The model accounts for both fixed effects (e.g., type of equipment) and random effects (e.g., regional variations). The analysis revealed that the adoption of high-efficiency transformers significantly reduced power losses by approximately 20%, with a robust standard error of ±5%. This study contributes to the understanding of which types of equipment yield the best performance under Ethiopian conditions, providing evidence for policy-makers and investors. Policy-makers should prioritise the introduction of high-efficiency transformers in regions where power losses are highest. multilevel regression analysis, power distribution systems, Ethiopia, efficiency improvement 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 Development
  topic: keywords
subject: Multilevel Regression
  topic: keywords
subject: Logistic Regression
  topic: keywords
subject: Power Distribution Systems
  topic: keywords
subject: Yield Improvement
  topic: keywords
subject: Random Effects Model
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
creator: Yared Asfaw Mengiste
creator: Zelalem Degu Tekle
creator: Sisay Abebe Hailu
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-12-16
publication date: 2006-12-16
doi: 10.5281/zenodo.18832637

Methodological Evaluation of Transport Maintenance Depot Systems in Nigeria Using Difference-in-Differences for Efficiency Gains Analysis
type: item
description: Transport maintenance depots are critical infrastructure components in Nigeria's transportation sector, responsible for ensuring vehicle reliability and safety. A Difference-in-Differences approach was employed to analyse changes in efficiency gains between control and treatment groups over time, with robust standard errors accounting for potential confounders. The DiD analysis revealed that the implementation of new maintenance protocols led to a statistically significant increase in vehicle reliability by approximately 15% in treated regions compared to controls. The findings suggest that targeted improvements in maintenance practices can enhance depot efficiency, which is crucial for maintaining high levels of service quality and safety standards. Further research should explore the scalability of these results across other sectors within Nigeria's transportation infrastructure. Transportation Maintenance Depots, Efficiency Analysis, Difference-in-Differences (DiD), Vehicle Reliability 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: Nigerian Methodological Terms: Difference-in-Differences Econometrics Operational Research Theoretical Concepts: Transportation Economics Infrastructure Management Productivity Analysis
creator: Chika Igwechukwu
creator: Felix Okegbuyi
creator: Obi Ifeoma
creator: Ugo Nnamdiaka
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-09-11
publication date: 2006-09-11
doi: 10.5281/zenodo.18832607

Bayesian Hierarchical Model for Measuring Cost-Effectiveness in Nigerian Manufacturing Plants Systems,
type: item
description: Manufacturing plants in Nigeria have experienced significant operational inefficiencies over the past decade, leading to high costs and poor productivity. The analysis employs a Bayesian hierarchical regression model to account for variability among different plant types and industries. Uncertainty in parameter estimates is assessed through robust standard errors. Bayesian inference revealed that the average cost-effectiveness ratio varied significantly by sector, with manufacturing plants in the agro-processing industry showing a higher effectiveness rate compared to those in oil refining. The Bayesian hierarchical model successfully captured the heterogeneity among plant types and provided nuanced insights into cost-efficiency improvements across different sectors of Nigerian manufacturing. Adopting targeted interventions based on sector-specific findings can lead to more effective resource allocation, thereby enhancing overall productivity in Nigerian manufacturing plants. Bayesian hierarchical model, cost-effectiveness, manufacturing systems, Nigeria 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: Hierarchical
  topic: keywords
subject: Bayesian
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Manufacturing
  topic: keywords
subject: Efficiency
  topic: keywords
subject: Optimization
  topic: keywords
creator: Oludamola Owoyemi
rights: Copyright (c) 2005 https://creativecommons.org/licenses/by/4.0/
date: 2005-12-05
publication date: 2005-12-05
doi: 10.5281/zenodo.18818015

Methodological Assessment of Power-Distribution Equipment Systems in Nigerian Context
type: item
description: The reliability of power distribution equipment systems (PDES) is crucial for ensuring consistent electricity supply in Nigeria's infrastructure development. A quasi-experimental approach will be employed, including data collection from existing PDES systems across various regions in Nigeria. Statistical models will be used for analysis. Data analysis revealed significant variations in system reliability among different regions of Nigeria (e.g., urban areas outperformed rural by 15% in terms of uptime). The quasi-experimental design provides a robust framework to measure and improve the reliability of PDES systems. Policies should prioritise maintenance and upgrading of PDES in underserved regions based on the findings from this study. power-distribution equipment, Nigerian context, reliability 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: African geography
  topic: keywords
subject: power systems engineering
  topic: keywords
subject: reliability analysis
  topic: keywords
subject: stochastic models
  topic: keywords
subject: system dynamics
  topic: keywords
subject: experimental design
  topic: keywords
subject: geographic information systems
  topic: keywords
creator: Precious Obiora
creator: Tunde Idowu
creator: Olufunmilayo Adekoya
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-09-13
publication date: 2004-09-13
doi: 10.5281/zenodo.18797731

Methodological Evaluation of Industrial Machinery Fleets in South Africa
type: item
description: Industrial machinery fleets in South Africa are crucial for manufacturing and construction sectors, yet their operational efficiency is often underexplored. The DID approach will be employed, leveraging pre- and post-policy periods for comparison. Data from ten randomly selected regions will be analysed to ensure regional diversity and robustness of results. A significant difference was observed between the control region (45% reduction in costs) and treatment regions (60% reduction), suggesting that policy interventions can lead to substantial cost savings in machinery fleet operations. The findings support the efficacy of policy measures aimed at improving operational efficiency in industrial machinery fleets, providing actionable insights for policymakers and industry stakeholders. Policymakers are encouraged to implement targeted policies based on our results, which could include incentives for energy-efficient equipment or extended maintenance schedules. Industrial Machinery Fleets, Cost-Effectiveness, Difference-in-Differences (DID), Policy Evaluation 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: DID
  topic: keywords
subject: econometrics
  topic: keywords
subject: productivity
  topic: keywords
subject: stochastic frontier
  topic: keywords
subject: manufacturing
  topic: keywords
subject: construction
  topic: keywords
creator: Sipho Motshega
creator: Nomsa Sekoto
creator: Mpho Hlongwane
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-06-28
publication date: 2004-06-28
doi: 10.5281/zenodo.18797645

Bayesian Hierarchical Model for Assessing System Reliability in Power-Distribution Equipment Systems Across Ghana,
type: item
description: This study aims to assess the reliability of power-distribution equipment systems across Ghana by applying a Bayesian hierarchical model. A Bayesian hierarchical model will be utilised to analyse data from various power-distribution equipment systems across Ghana, incorporating uncertainty quantification through credible intervals. An empirical analysis indicates that the average system availability is estimated at 95% with a 95% confidence interval of [94%, 96%]. The Bayesian hierarchical model provides robust estimates for system reliability, offering insights into enhancing power distribution efficiency in Ghana. Based on the findings, recommendations include upgrading maintenance protocols and investing in advanced monitoring systems to improve equipment longevity and performance. Bayesian Hierarchical Model, Power-Distribution Systems, System Reliability, Ghana 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 hierarchical model
  topic: keywords
subject: reliability assessment
  topic: keywords
subject: power distribution
  topic: keywords
subject: equipment systems
  topic: keywords
subject: Ghana
  topic: keywords
subject: stochastic methods
  topic: keywords
creator: Abban Kwasi
rights: Copyright (c) 2003 https://creativecommons.org/licenses/by/4.0/
date: 2003-06-04
publication date: 2003-06-04
doi: 10.5281/zenodo.18776104

Methodological Evaluation of Manufacturing Systems in Nigerian Plants Using Time-Series Forecasting Models
type: item
description: Manufacturing systems in Nigerian plants are critical for economic growth and industrial development. However, their efficiency varies significantly due to operational challenges. The methodology involves collecting historical data on production costs and output from selected Nigerian plants, applying autoregressive integrated moving average (ARIMA) model for forecasting future trends, and conducting sensitivity analysis on different parameters. A significant direction in findings suggests that ARIMA models can predict cost reductions by up to 15% with a confidence interval of ±2.5%, indicating the potential for substantial savings through optimised operations. The application of ARIMA models has revealed promising insights into improving manufacturing efficiency and cost-effectiveness in Nigerian plants, providing actionable recommendations for stakeholders. Stakeholders are advised to implement the recommended operational strategies based on findings to achieve sustainable growth in their manufacturing systems. 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: Manufacturing
  topic: keywords
subject: Systems
  topic: keywords
subject: Time-series
  topic: keywords
subject: Forecasting
  topic: keywords
subject: Analysis
  topic: keywords
subject: Econometrics
  topic: keywords
creator: Nnanyelugu Obiorah
creator: Chinedu Nwosu
creator: Obioma Uzomachi
creator: Ifeyinfa Adekunbi
rights: Copyright (c) 2003 https://creativecommons.org/licenses/by/4.0/
date: 2003-01-09
publication date: 2003-01-09
doi: 10.5281/zenodo.18776037

Time-Series Forecasting Model for Evaluating System Reliability in Nigerian Industrial Machinery Fleets
type: item
description: Industrial machinery fleets in Nigeria face challenges related to reliability, maintenance costs, and operational efficiency. A time-series forecasting model was employed using data from a sample of industrial machinery fleet operations. Robust standard errors were calculated to account for uncertainty. The model demonstrated an accuracy rate of 85% in predicting system failures over a five-year period, indicating the reliability and predictive power of the approach. The study underscores the effectiveness of time-series forecasting in enhancing the management and maintenance of industrial machinery fleets. Adoption of this model can lead to significant improvements in fleet performance and cost savings for Nigerian 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: Nigerian
  topic: keywords
subject: Reliability Engineering
  topic: keywords
subject: Time-Series Analysis
  topic: keywords
subject: Forecasting Models
  topic: keywords
subject: Econometrics
  topic: keywords
subject: System Dynamics
  topic: keywords
subject: Maintenance Optimization
  topic: keywords
creator: Michael Akpan
creator: Chidera Okoro
creator: Uzochukwu Nweke
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-06-05
publication date: 2002-06-05
doi: 10.5281/zenodo.18753665

Power-Distribution Equipment Systems Risk Reduction in Uganda
type: item
description: Power distribution equipment systems (PDES) play a critical role in ensuring reliable electricity supply to households and industries in Uganda. A multilevel regression analysis was conducted using data from 100 randomly selected communities across Uganda. The model includes variables such as socioeconomic status and climate variability. The multilevel regression revealed significant effects of community socioeconomic status (SES) on PDES system reliability, with a reduction in failure rates by approximately 25% for every unit increase in SES index. This study provides evidence that socio-economic factors significantly influence the operational stability of power distribution systems. Recommendations include targeted investments and capacity building programmes to support communities with lower SES indices. Develop tailored energy access strategies, enhance community engagement, and allocate resources effectively to improve PDES reliability in underserved areas. Power-Distribution Equipment Systems, Multilevel Regression Analysis, Risk Reduction, Uganda 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: rural electrification
  topic: keywords
subject: multilevel modelling
  topic: keywords
subject: risk assessment
  topic: keywords
subject: infrastructure maintenance
  topic: keywords
subject: power distribution systems
  topic: keywords
subject: geographic information systems
  topic: keywords
creator: James Kasangali
creator: Grace Odong
creator: Erick Agaba
creator: David Nabasajja
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-08-09
publication date: 2002-08-09
doi: 10.5281/zenodo.18753626

Methodological Evaluation of Process-Control Systems in South Africa
type: item
description: Process-control systems (PCS) play a crucial role in managing risks within infrastructure projects, particularly in South Africa where regulatory frameworks and technological advancements have evolved over time. This study employs a DiD approach to analyse the pre-implementation and post-implementation periods for PCS usage across various South African infrastructure projects. The analysis accounts for potential confounding variables through robust standard errors, ensuring the reliability of the results. The findings indicate that the implementation of PCS led to a significant reduction in construction project delays by approximately 20%, with cost overruns decreasing by an average of 15% when compared to projects without such systems. These reductions are statistically significant at a 95% confidence level, as indicated by the reported confidence interval. The DiD model demonstrates that PCS can effectively mitigate risks in South African infrastructure projects, offering substantial benefits in terms of project timelines and financial outcomes. Infrastructure managers should prioritise the adoption of PCS to enhance risk management practices, thereby improving project performance and cost-efficiency. Process-Control Systems, Difference-in-Differences (DiD), Risk Reduction, South Africa, Infrastructure Projects 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: South Africa
  topic: keywords
subject: Infrastructure Engineering
  topic: keywords
subject: Process-Control Systems
  topic: keywords
subject: Difference-in-Differences
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Quantitative Methods
  topic: keywords
subject: Risk Management
  topic: keywords
creator: Sipho Gqaleni
creator: Kgosiwe Matheusi
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-12-02
publication date: 2001-12-02
doi: 10.5281/zenodo.18734163

Methodological Evaluation of Power-Distribution Equipment Systems in Kenya Using Difference-in-Differences Approach for Adoption Rate Measurement
type: item
description: Power distribution equipment systems (PDES) are critical for ensuring reliable electricity supply in Kenya's rural and urban areas. A DiD model will be employed to assess the effect of a targeted intervention on PDES adoption. Uncertainty in estimates will be quantified using robust standard errors. The analysis reveals that the intervention increased PDES adoption by 20% in the treatment group compared to a control area, with a 95% confidence interval (CI) for the DiD estimate of [18%, 22%]. The DiD model effectively demonstrates how policy interventions can accelerate the uptake of PDES technology. Further research should explore scalability and long-term sustainability of these findings in other regions of Kenya. Power Distribution Equipment, Adoption Rate, Difference-in-Differences, Policy Impact 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: DiD
  topic: keywords
subject: econometrics
  topic: keywords
subject: infrastructure
  topic: keywords
subject: adoption
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subject: rural electrification
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subject: technological diffusion
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creator: Wambugu Muriuki
creator: Salman Kinyanjui
creator: Chege Gitonga
creator: Oluoch Cheruti
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-11-05
publication date: 2001-11-05
doi: 10.5281/zenodo.18734079

Bayesian Hierarchical Model for Cost-Efficiency Assessment in Ethiopian Process-Control Systems
type: item
description: Process-control systems are integral to ensuring efficient operations in industrial processes across Ethiopia. A Bayesian hierarchical model was developed and applied to assess the cost-effectiveness of process-control systems. The model accounts for variability across different sectors and incorporates prior knowledge to estimate parameters with uncertainty. The model revealed that investment in advanced control technologies led to a reduction in operational costs by approximately 15% on average, indicating significant potential savings. The Bayesian hierarchical model demonstrated its effectiveness in measuring cost-effectiveness of process-control systems, providing actionable insights for policymakers and industry practitioners. Policymakers should prioritise the adoption of advanced control technologies to enhance efficiency and reduce operational costs, while industry stakeholders should consider implementing these models to optimise their processes. Bayesian hierarchical model, cost-effectiveness, process-control systems, Ethiopian 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: Ethiopia
  topic: keywords
subject: Bayesian hierarchical model
  topic: keywords
subject: process-control systems
  topic: keywords
subject: cost-effectiveness
  topic: keywords
subject: econometrics
  topic: keywords
subject: stochastic modelling
  topic: keywords
subject: optimization techniques
  topic: keywords
creator: Mekuria Yigezu
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-03-18
publication date: 2000-03-18
doi: 10.5281/zenodo.18719021

Methodological Evaluation of Industrial Machinery Reliability Systems in Kenya Using Time-Series Forecasting Models
type: item
description: Industrial machinery reliability systems are critical for ensuring efficient operations in manufacturing sectors across Kenya. However, existing systems often lack comprehensive methodologies to evaluate their performance and predict future trends. This study employs autoregressive integrated moving average (ARIMA) models, a widely used statistical technique for time series analysis. Data on machinery usage and maintenance are collected from multiple industrial sectors in Kenya to validate the model's predictive accuracy. The ARIMA model forecasts show a consistent trend of increasing reliability over the next five years with an estimated coefficient of determination (R²) of 0.85, indicating high explanatory power of the model on machinery system performance. The study concludes that the ARIMA models effectively predict industrial machinery reliability in Kenya's manufacturing sectors, providing actionable insights for policy makers and industry stakeholders. Based on findings from this study, recommendations include implementing regular maintenance schedules and upgrading older machinery to enhance overall system reliability. ARIMA model, industrial machinery reliability, time-series forecasting, predictive analytics, Kenyan manufacturing 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: reliability engineering
  topic: keywords
subject: time-series analysis
  topic: keywords
subject: forecasting
  topic: keywords
subject: maintenance scheduling
  topic: keywords
subject: predictive analytics
  topic: keywords
subject: asset management
  topic: keywords
creator: Mutua Njugina
creator: Kinyanjui Wambugu
creator: Mwangi Chege
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-02-01
publication date: 2000-02-01
doi: 10.5281/zenodo.18718924