Ask any industry practitioner about the duration and effort required to embed maintenance and reliability best practices into an organization, and the response is likely to be consistent: It's not a short-term endeavor, and the effort is substantial. But on the journey to maintenance and reliability excellence, it's critical to deliver short-term results along the way. Positive results are necessary from a pure financial perspective, of course, but they are also required to maintain momentum, employee support, and executive support for long-term objectives.
Outlined below are four initiatives/activities that can be implemented with little financial investment and that will provide immediate, significant results.
Lubrication is the lifeblood of any plant that operates rotating equipment. And although it represents a relatively low percentage of the maintenance spend, it has the potential to result in very significant failure consequences if not managed correctly. As a result, the return on investment for lubrication improvements is very high.
A simple illustration of the effects is the calculation for bearing life found in ISO standard 281:2007. According to the standard, the difference in the “modified rating life” of the bearing can be as much as 50% between “high cleanliness” and “typical contaminations.” In other words, improving lubrication cleanliness can literally double component life. The effects on more-complex rotating equipment can be even more significant.
Bulk oil storage practices are a great place to start because lubrication storage and transportation provide ample opportunities for contamination. Proper dispensing filtration, desiccant breathers, and color-coding of lubrication types all are best practices. Self-contained storage units utilizing built-in, color-coded dispensers and tanks can be purchased for as little $50,000 (plantwide) and will protect vital lubrication from ambient contaminants as well as prevent human error while dispensing.
Another area of focus with high return is filtration for stored lubrication and in-service lubrication. The cleanliness of lubrication purchased from the manufacturer can be highly variable. Between processing, storage, and transportation, there are many opportunities for contamination to be introduced before the lubrication is packaged and delivered to your facility. Therefore, it's critical to filter the oil before it is put in a machine or in the bulk oil storage system. For critical in-service lubrication, mobile kidney-loop systems can be added for less than $5,000 and, as outlined by ISO, can more than double component life.
Finally, coupling oil analysis with a robust lubrication program can further extend component life and lubrication life and predict impending failures. Close monitoring of lubrication conditions can optimize replacement intervals and reduce costs associated with unexpected failures. A basic analysis can be done by a quality lab for $25–$30 per sample.
2. Root-cause failure analysis
The foundation of any business improvement or reliability program is root-cause failure analysis (RCFA). Not only does RCFA serve as a catalyst to shift an organizational culture from reactive to proactive, but also it typically provides a double-digit return on investment. The best part is that anybody can do a basic RCFA investigation – shop floor crafts, operators, engineers, or managers. The investigation can be as simple as a basic 5 why or can employ a more-advanced technique, such as a fault tree or cause mapping. Regardless of the tool, the investigation can be done in a matter of hours or days, and identified corrective actions are typically implemented in less than a month.
The RCFA's returns, furthermore, are not limited to the failure the analysis is specifically addressing. The analysis will identify the latent roots, also described as system or organizational roots. These are the underlying reasons why actions that led up to the failure were taken or not taken. Because these roots are systemic to the organization, the corrective actions and associated returns are not limited to the focus area of the analysis. As a result, RCFA can be a powerful proactive tool that addresses defects across the entire facility with minimal resources.
3. Preventive maintenance optimization
Preventive maintenance (PM) hours often consume a large portion of maintenance time, which may result in overtime or the need for contract labor to perform corrective and emergency work. Additionally, if failures are experienced between PM intervals, the original preventive work may not even be value-added. This is especially true in facilities where new PMs are added as a result of misguided corrective actions that either do not address failure modes or address them incorrectly. Of course, legacy PM activities tend never to be “turned off” or evaluated, either, and over time, much of the PM program becomes wasted effort.