Productivity measurement using Objective Matrix: Case study in plate mill

Abstract

A decline of production level in December 2018 requires an evaluation. Productivity measurement is required to calculate performance. The purpose of this study is to measure the level of productivity using the objective matrix (omax). There were four steps to perform Omax. First step is select performance criteria, second is establish performance scales, third is rate the relative importance of the performance criteria, and the last is calculate the team productivity indicator. There were five ratios that become performance criteria, namely actual production compared to the target, material consumption, available time, makeup water consumption, and electricity consumption. The weight of each ratio is known in sequence from ratio 1 to ratio 5 were: 30%, 20%, 30%, 5%, and 15%. The performance index obtained the 3rd week has the highest productivity value, while the 4th week has the lowest productivity value, but the value is higher than standard value. From the value per ratio, we learned the ratio 1 has a fairly good performance, while the ratio 3 performance is considered less, because it is in the red zone.