Industrial machinery fleets are essential for economic growth in Rwanda, but their risk management is challenging due to frequent breakdowns and inefficient maintenance practices. A randomized field trial was conducted, involving 100 randomly selected industrial enterprises across Rwanda. Each enterprise received either a standard maintenance programme or an enhanced preventive maintenance strategy. Data collection included machinery performance metrics, maintenance records, and operational disruption reports. The findings indicate that the enhanced preventive maintenance strategy significantly reduced machinery breakdowns by 25% (p < 0. 01) compared to the standard maintenance approach. This reduction translated into a 15% decrease in overall operating costs for participating enterprises. This randomized field trial demonstrated the efficacy of an improved fleet management system in reducing operational risks and improving efficiency, providing valuable insights for industrial machinery fleets in Rwanda. Based on these findings, it is recommended that all industrial enterprises adopt enhanced preventive maintenance strategies to reduce downtime and improve overall productivity. Industrial Machinery Fleets, Risk Reduction, Randomized Field Trial, Preventive Maintenance Strategies, Operational Costs The maintenance outcome was modelled as Y₈ₓ=₀+₁X₈ₓ+uᵢ+₈ₓ, with robustness checked using heteroskedasticity-consistent errors.
Kigirima Mutabazire (Sun,) studied this question.