Maintworld 2/2018

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ASSET MANAGEMENT The criticality spectrum: a means to focus our attention where it is warranted Developing an asset criticality ranking (ACR) is an important part of any reliability and performance improvement initiative. The criticality ranking enables an organization to prioritize and justify a wide range of activities and investments. JASON TRANTER, CMRP, Mobius Institute, jason@mobiusinstitute.com 6 maintworld 2/<strong>2018</strong> UNFORTUNATELY, it is all too common to perform a very basic criticality analysis that does not allow decisions to be made (and has very little buy-in). And in the author’s opinion, it is also too common for people to perform an analysis that is far too detailed, in the form of RCM or FMECA. The aim of this article is to propose a graduated approach to assessing criticality which makes best use of your time while providing the decision-making information you need. The criticality spectrum The basic idea of the criticality spectrum is that we perform more and more detailed analysis based on criticality. At one end we have very little information to go on, i.e., a system criticality analysis. At the other end we have a great deal of information to go on, i.e., a detailed (but expensive) reliability centered maintenance (RCM) or failure modes, effects, and criticality analysis (FMECA). We could start with the system criticality ranking and then perform more detailed analysis on the assets within a critical system. As you will soon read, we can perform a more and more detailed asset criticality analysis, and then a component criticality analysis on the critical assets, and finally the far more detailed RCM or FMECA analysis on the most critical assets or components. As we move from left to right on the spectrum we will determine which assets warrant a more detailed analysis, thus saving time and providing focus where it is necessary. Let’s take a closer look.
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