Three dimensional (3D) Cost-Downtime model for hostel facilities maintenance

Abstract

This paper is part of an on-going research on the development of maintenance cost and down time model for Higher Education Institution Hostel facility maintenance in Malaysia where the case study is conducted at Kolej Universiti Islam Melaka (KUIM). The model is developed to assist maintenance staff based on calculated total cost and downtime from the maintenance data. The decision that has to be made is focused on the replacement action where all taking account on the frequency basis. This is due to the item is not subject to failure but consider the operating cost and downtime with use. The advantage of the graph of total cost downtime per unit time curve is with the optimal value, it consider the total cost around the optimum. If the curve is fairly flat around the optimum, it shows that no extensive plan for the replacements exactly at the optimum. However, if there is uncertainty regarding the value of the stated parameter required during the analysis, then the optimal replacement is doubtful. In addition, by giving variety set of values of the total cost and downtime, the curve could in consequence affect the optimal solution and graphically shown in 3 Dimensional (3D).