In Senegal, process-control systems have been implemented in various industries to enhance operational efficiency and yield. A DiD analysis was applied to compare pre- and post-intervention yields in control and intervention groups. Uncertainty around estimates is reported with robust standard errors. The DiD model revealed a significant increase of approximately 15% in yield for the intervention group compared to controls, but this effect varied by sector. Process-control systems have shown promise in improving yields across different industries in Senegal, though effects differ significantly between sectors. Further research should focus on identifying and addressing sector-specific challenges to maximise system effectiveness. DiD model, process control systems, yield improvement, Senegal The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.