The advantage of the curve is that, along with giving the optimal value, it shows the total cost and downtime around the optimum.

This is usually useful to plot the total cost and downtime per unit time curve. The study is aimed to assist maintenance engineers in deciding an appropriate replacement policy. The decision areas addressed is based on the replacement action. The model is developed to analyze the total cost and downtime for various values of the uncertain parameter by using Artificial Intelligence (AI) method, namely, Ant Colony Optimization (ACO), noting the effect of this variation on the optimal solution. Download 'INTELLIGENT OPTIMAL REPLACEMENT MODEL FOR HOSTEL FACILITIES MAINTENANCE'ġ Jilid : INTELLIGENT OPTIMAL REPLACEMENT MODEL FOR HOSTEL FACILITIES MAINTENANCE Yuseni Ab Wahab 1 & Abd Samad Hasan Basari 2 1 Kolej Universiti Islam Melaka 2 Universiti Teknikal Malaysia Melaka Abstract This paper is part of an on-going research on the development of intelligent optimal replacement model for Hostel facility maintenance in Malaysia where the case study is conducted at Kolej Universiti Islam Melaka (KUIM).