Asset Management / Life Cycle Cost

Asset Management

The Real Value of the Plant You’re Buying

When a firm makes the decision to divest of a plant, management immediately begins to take actions to increase the perceived value of the asset. Just as an individual thoroughly cleans and details an automobile before putting it up for sale, plant owners want to make the plant look as good as possible to drive up the prospective buyer’s perceived value of the plant or to cover “warts” that suitors might view as liabilities – a practice commonly referred to as “window dressing.” Some of these window dressings can have an adverse impact on the reliability of the plant, thus reducing the plant’s true value, which, unfortunately, won’t be felt for months or years after you’ve bought the plant.

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Asset Management

Use this Game Plan to Justify an Investment in Maintenance and Reliability

As many of us strive to improve the reliability of our plants, several comments bemoan how challenging that is to do in an era of continuous deep cost cutting. They say that in their operation, maintenance is seen as a cost, and is one of the first things to arbitrarily cut. Some think their operations have cut too far! What they seek is a way to justify a strong maintenance capability. I submit that one approach is to speak of maintenance as an “investment in capacity.” Use the language that plant managers, controllers and senior management understands: capital investment and return on investment (ROI).

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Preventive Maintenance

Use P-F Intervals to Map, Avert Failures

The potential-to-functional failure interval (P-F interval) is one of the most important concepts when it comes to performing Reliability-Centered Maintenance (RCM). Remarkably, the P-F interval is also one of the most misunderstood RCM concepts. The failure mode analysis becomes even more complicated when you are dealing with several P-F intervals for one failure mode. This paper will help clarify the P-F interval and the decision-making process when dealing with multiple P-F intervals.

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Root Cause

Improvement: What Comes First?

I use the term RCPE because it is a waste of good initiatives and time to only find the root cause of a problem, but not fixing it. I like to use the word problem; a more common terminology is Root Cause Failure Analysis (RCFA), instead of failure because the word failure often leads to a focus on equipment and maintenance. The word problem includes all operational, quality, speed, high costs and other losses. To eliminate problems is a joint responsibility between operations, maintenance and engineering. 

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Asset Management

What is the True Downtime Cost (TDC)?

The key to realizing greater savings from more informed management decisions is to predetermine the “True” cost of downtime for each profit center category. True downtime cost is a methodology of analyzing all cost factors associated with downtime, and using this information for cost justification and day to day management decisions. Most likely, this data is already being collected in your facility, and need only be consolidated and organized according to the true downtime cost guidelines.

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couplings
Lubrication

The Lubrication Requirements of Couplings

In an ideal world, multiple components could be produced in a single piece, or coupled and installed in perfect alignment. However, in the real world, separate components must be brought together and connected onsite. Couplings are required to transmit rotational forces (torque) between two lengths of shaft, and despite the most rigorous attempts, alignment is never perfect. To maximize the life of components such as bearings and shafts, flexibility must be built in to absorb the residual misalignment that remains after all possible adjustments are made. Proper lubrication of couplings is critical to their performance.

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Root Cause

Analyzing Semiconductor Failure

Semiconductor devices are almost always part of a larger, more complex piece of electronic equipment. These devices operate in concert with other circuit elements and are subject to system, subsystem and environmental influences. When equipment fails in the field or on the shop floor, technicians usually begin their evaluations with the unit’s smallest, most easily replaceable module or subsystem. The subsystem is then sent to a lab, where technicians troubleshoot the problem to an individual component, which is then removed–often with less-than-controlled thermal, mechanical and electrical stresses–and submitted to a laboratory for analysis. Although this isn’t the optimal failure analysis path, it is generally what actually happens.

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Corrective Maintenance and Repairs

Keys for Effective Troubleshooting

Expert troubleshooters have a good understanding of the operation of electrical components that are used in circuits they are familiar with, and even ones they are not. They use a system or approach that allows them to logically and systematically analyze a circuit and determine exactly what is wrong. They also understand and effectively use tools such as prints, diagrams and test instruments to identify defective components. Finally, they have had the opportunity to develop and refine their troubleshooting skills.

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