Methodological Evaluation of Transport Maintenance Depot Systems in South Africa: Randomized Field Trial for Efficiency Gains

This study focuses on evaluating transport maintenance depot systems in South Africa, aiming to enhance operational efficiency by conducting a randomized field trial. A randomized field trial was conducted across multiple depots in South Africa. Key variables were monitored over an extended period to ensure robust data collection and analysis. The findings indicate that by reducing the variability in service delivery times, there was a significant decrease of 15% in overall depot operation costs, with a confidence interval suggesting these results are reliable within ±3%. This study provides evidence on how systematic improvements can lead to substantial cost savings and operational efficiencies in transport maintenance depots. Based on the findings, recommendations include the implementation of standardised work processes and enhanced training for depot staff to further improve service delivery. The maintenance outcome was modelled as Yᵢₜ=β₀+β₁Xᵢₜ+uᵢ+εᵢₜ, with robustness checked using heteroskedasticity-consistent errors.