How Much Maintenance is Enough? RCM Delivers the Right Maintenance Strategy for a Critical Lift Station
As part of its enterprise asset management strategy, MCES selected a Best Management Practice called Reliability Centered Maintenance (RCM) analysis to improve O&M results. An RCM study was performed on a critical lift station to evaluate existing operations and maintenance practices and determine if they could be improved to:
Increase the reliability of the lift station, especially during critical flow events
Determine the right maintenance strategy to support day-to-day lift station operation, and
Determine the right amount of staff to sustain the lift station's function.
The RCM study was conducted in a facilitated, workshop environment to analyze the essential functions of the lift station, identify critical equipment and define the operating and maintenance tasks that could prevent critical failures. MCES used the 7-Step Classical RCM process, which provided a clear and straightforward path through the system analysis process. The result was a compelling recommendation with specific enhancements designed to immediately improve the current lift station maintenance strategy.
Based on input from senior operators and maintainers and data from MCES' Oracle WAM Computerized Maintenance Management System (CMMS), the study documented a practical maintenance strategy based on real-world experience that balanced resource demands with reliability, factoring in the station's high level of design redundancy.
At the end of the RCM study, the participants provided an evaluation of the process itself. The application of RCM was unanimously supported as a valuable tool by the group, with certain cautions about the best areas of applicability.
Subsequently, Experience Centered Maintenance (ECM), a less intensive maintenance analysis methodology that compliments RCM, was used to evaluate and improve maintenance practices for less critical lift stations. The ECM study provided insight on the merit of existing preventive maintenance tasks and recommended several additional tasks that would improve reliability and reduce cost.
The O&M procedures derived from RCM and ECM eliminate surprise failures and efficiently use staff resources. The procedures were developed by and for O&M staff and as a result have a great deal of ownership and buy-in that has benefited implementation. Management has found the results helpful in providing a basis for O&M budgets and determining staffing levels.
Keywords: Classical Reliability Centered Maintenance; Consequence of Failure; Corrective Maintenance; ECM; Experience Centered Maintenance; Failure Modes and Effects Analysis; Knowledge Capture; Predictive Maintenance; Preventive Maintenance; RCM; Risk; Staffing Optimization
Document Type: Research Article
Publication date: 2011-01-01
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites