The effectiveness of process-control systems in Nigerian industries is crucial for cost-efficiency and productivity improvements. A randomized field trial was conducted across various sectors to measure the impact of process-control systems on operational costs and productivity. Statistical models were employed to analyse the data, ensuring robustness through uncertainty intervals. The analysis revealed that the implementation of advanced control systems led to a reduction in operational costs by approximately 15% compared to traditional methods, with an estimated 95% confidence interval for cost savings. The study underscores the potential for process-control systems to enhance cost-effectiveness across Nigerian industries, providing empirical evidence that supports their deployment and further research. Industry stakeholders are encouraged to adopt standardised methodologies for evaluating process-control systems, based on this randomized field trial's findings. Process-Control Systems, Cost-Effectiveness, Randomized Field Trial, Nigeria The maintenance outcome was modelled as Y₈ₓ=₀+₁X₈ₓ+uᵢ+₈ₓ, with robustness checked using heteroskedasticity-consistent errors.
Nweke et al. (Tue,) studied this question.