Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/120548
AS I SEE IT * OMC=MCF x FOF MACHINE CRITICALITY FACTOR PRE-ORS POST-ORS Machine Criticality Factor (MCF) 5 5 Failure Occurrence Factor (FOF) 8 1 Machine Duty 3 3 Lubricant Quality/Performance 2 1 Lubrication Effectiveness 1 0 Fluid Environment Severity 3 0 Effectiveness of Early Warning Systems -1 -3 70 72 80 Overall Machine Criticality (OMC)* 40 5 72 81 90 OMC Zone Amber Blue 80 90 100 OMC Risk High Risk Low Risk 2 3 4 5 6 7 8 9 10 1 1 2 3 4 5 6 7 8 9 10 2 2 4 6 8 10 0 12 14 16 18 20 3 3 6 9 12 12 15 18 21 24 27 30 4 4 8 12 16 20 24 28 32 36 40 5 5 10 15 20 25 30 35 40 45 50 6 6 12 18 24 24 30 36 42 48 54 60 7 7 14 21 28 28 35 42 49 56 63 8 8 16 24 32 2 40 40 48 56 64 9 9 18 27 36 45 5 54 63 10 FAILURE OCCURRENCE FACTOR 1 10 20 30 40 50 60 70 Figure 6. This OMC matrix illustrates how improvements in lubricant selection, lubrication methods, contamination control and oil analysis brought a machine's risk profile down from 40 to 5. An excellent place to start is by developing a current risk profile of your critical machinery (pre-ORS). This reveals the opportunity and all the low-hanging fruit that no one has seemed to notice. Optimum is undefinable without understanding risk. By using the tools described here, you not only can understand risk (criticality and occurrence), but you can also have a solid plan for remediation to de-risk your plant. Don't fail to capitalize on the riches (collect the fruit) that can be gained by transformation to the Optimum Reference State. Figure 8. Illustration of how bringing a machine to the Optimum Reference State can reduce risk. About the Author Jim Fitch has a wealth of "in the trenches" experience in lubrication, oil analysis, tribology and machinery failure investigations. Over the past two decades, he has presented hundreds of courses on these subjects. Jim has published more than 200 technical articles, papers and publications. He serves as a U.S. delegate to the ISO tribology and oil analysis working group. Since 2002, he has been director and board member of the International Council for Machinery Lubrication. He is the CEO and a co-founder of Noria Corporation. Contact Jim at jfitch@noria.com. Figure 7. This post-ORS Reliability Elements Quotient shows how the Failure Occurrence Factor improved from 8 to 1 after several modifications were made. 8| March - April 2013 | www.machinerylubrication.com