An extensive system that lacks real world applicability.
Ignores the benefits of experience within the actual operating context.
Enacting in response to breakdown/incentive, based on OEM schedule or approximations.
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"The result of poor maintenance coordination is less than optimum plant performance with a growing maintenance backlog and productivity running as low as 35%."
The necessary tasks can be determined by experienced maintenance personnel, or from following OEM guidelines. Likewise, collaborating with production schedules and parts/tools availability is simply a matter of good planning. The only thing left is to determine the frequency of these actions.
RCM, in it’s many forms, is generally too unwieldy for real world application. Its use should be reserved for complex pieces of machinery with very involved maintenance requirements.
Creating asset hierarchies has a twofold effect.
The importance of the component itself is ranked separately in the next phase. A rudimentary ranking system is shown below.
An alternative scale can be used, provided it ranks along similar lines.
Then rank the individual component as how it supports the process it is tied to.
The next step is to combine the two rankings for a table that looks like this:
Now that we have discussed the pros and cons of the various popular maintenance strategies and have started to define what is essentially a quickly deployed hybrid between complex strategies like RCM and simple PM schedules, we rank the assets on criticality of failure and the importance of the process they support. These tables can be combined into a quick reference for overall asset importance.
This goes hand-in-hand with the relative importance ranking principle established in Step 2. Old machinery that also has high criticality will need much more attention or possible replacement. Newer, less critical machinery can be given little attention.
There are a wide variety of available maintenance strategies. A few are listed below. Assets with low criticality (eg. C5) can be maintained with a run-to-failure strategy. High criticality assets however, (eg. A2) should have either intensive PM maintenance schedules and inspections, or an investment into some kind of condition monitoring technology. Available strategies include:
After all the groundwork has been laid, the specific activities need to be decided on. What needs to be done for each weekly PM? For each monthly PM? Each strategy implies a different level of asset care, and its corresponding activities. PM’s will include largely inspections and possible repair. RCM and continuous monitoring involve a much more intensive set of activities like different tests and calibrations. Build out a plan for every asset including as many details as possible for each maintenance activity. This plan should be re-examined and changed at different intervals.
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