MULTI - FACTOR FAILURE MODE CRITICAL ANALYSIS USING MCDM METHODS - A CASE STUDY IN A CONSTRUCTION INDUSTRY by Gurdeep Singh
Abstract
Indian construction industry has major contribution towards development of country. In India construction industry is expanding at good pace. With the development of country there will be construction of roads, bridges, flyovers, residential apartments, government sector and private sector infrastructure, airports, railways, ports etc. Construction depends highly upon heavy machinery. For production, mixing and pouring of concrete, various equipments are required and concrete pump is considered among highly critical equipments from execution and maintenance point of view. Therefore concrete pump needs better maintenance strategy to avoid breakdowns during pouring of concrete. At present the case company faces problems in prioritizing maintenance jobs, which results in higher maintenance cost, lower availability of machine, production loss and lower profitability. The present work is aimed to improve the maintenance strategies by using different MCDM techniques (modified TOPSIS, VIKOR and PROMETHEE) to find out most critical cause of failure for improving maintenance decision making concerning maintenance of Concrete Pump. For computing the weight of criterion Fuzzy SAW method is used, then using these weights maintenance criticality ranking is generated by using three multi criteria decision making (MCDM) techniques. Fuzzy SAW method determines the level of skill required as the most significant criterion followed by non-detection of failure, availability of spare parts, chance of failure, economic safety and no. of workers required. Best maintenance policy out of nine probable reasons of failure is identified using three MCDM methods, the most critical reason of failure according to modified TOPSIS, VIKOR and PROMETHEE rankings is material worn out (D7), second most critical reason of failure is quality of rubber (D6) and least critical cause is high pumping strokes (D1).
