Overall Equipment Effectiveness (OEE) and Reliability Analysis of the Water Supply Systems in Bonny Island

Abstract

Bonny Island is an island surrounded by water with 24 hours electricity and a home to many multinational companies, but Bonny is yet to boast of more than 2 hours of water supply in a day which is barely enough for individuals and businesses without adequate storage to carry out their daily activities. This research work used Overall Equipment Effectiveness OEE and the reliability analysis to evaluate the operational losses and also to know the factors militating water supply system in Bonny Island for remediation. OEE is formulated of three components, which are availability, performance, and quality. Six big losses such as breakdowns, setup and adjustments, small stops, slow running, start-up losses and production losses; are also important for calculation of OEE. Bonny Water Distribution Plant BWDP has a total capacity of 7.012 Million Litres per Day (MLD) for a population of about 175000 people. In this case study, data was collected for six months in all pumping stations. The result shows that BWDP has an average Availability of 88.84%, Quality of 85.58%, Performance of 83.45% and 61.27% OEE as compared to 90% Availability, 95% Quality, 99% Performance and 85% OEE of Seiichi Nakajima world class OEE system. To minimize these losses and to achieve world class OEE system, it was recommended that there should be reduction in events which are discussed in six big losses section, which include; fault in current, trips, pipeline leakages, water shortages in sump well and others