Evaluating the Mean Time Between Failure (MTBF) of Critical Building Systems in Students’ Hostel Buildings Within Lagos Metropolis

Abstract

Student hostel buildings in Lagos Metropolis, Nigeria, serve as essential infrastructure for higher education, yet they face significant maintenance challenges that impact functionality, safety, and student comfort. This study evaluates the Mean Time Between Failures (MTBF) for critical building systems in students’ hostels across four types of institutions. Using a purposive sampling approach, data were collected from 56 maintenance staff and porters. The data were analysed using the mean, relative influence index, Mann-Whitney U test and Kruskal-Wallis test as descriptive and inferential statistical tools, respectively. The results show that MTBF is highest for foundation issues (MTBF = 17182.7 hours) and lowest for wiring systems (MTBF = 1304.9 hours), while budget constraints (RII = 0.79), inadequate monitoring systems (RII = 0.77), spare parts availability (RII = 0.76), and poor maintenance documentation (RII = 0.76) are the topmost factors influencing MTBF of critical systems in hostel buildings. The study concludes that structural and foundational elements are the most reliable systems in students’ hostels with rare occurrences of failures, while wiring systems, lighting bulbs and water pipes are vulnerable systems with relatively low reliability. The study recommends improved budget allocation, regular inspections, technology integration and staff training as strategic interventions for enhancing system reliability and students’ satisfaction in hostel buildings.