Life Cycle Cost & Reliability For Process Equipment Page 21
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22interval by using a log-normal distribution, and this will increase the amount of realism for time expended
and costs incurred. Also spare part quantities can be calculated.
Good alternatives for LCC require creative ideas. This is the role of the engineer to suggest and
recommend cost effective alternatives. Much lower LCC are obtained when creative efforts are
employed in the design area--making changes downstream in the operating plants has smaller chances
for improvements because they’re employed too late in the improvement cycle.
Design engineers are the most important link in devising cost effective plants and naturally the burden of
LCC falls on their shoulders—but design engineers can’t perform an effective analysis unless they have
reasonable failure data from operations. Thus the need for plant and industry databases of failure
characteristics—remember, to obtain good failure data, both failure and success data must be identified.
If only the failure information is considered, then the failure database will be too pessimistic and no one
will believe it and worse yet, no one will use overly pessimistic data.
REFERENCES
nd
Abernethy, Robert B. 1996, The New Weibull Handbook, 2
Edition, self published—536 Oyster
Road, North Palm Beach, FL 33408-4328, phone: 561-842-4082
Barringer, H. Paul 1996a, “Life Cycle Costs”,
Barringer, H. Paul and David P. Weber 1996b, “Life Cycle Cost Tutorial”, Fifth International
Conference on Process Plant Reliability, Gulf Publishing Company, Houston, TX.
Barringer, H. Paul 1996c, “Download free Life-Cycle Cost software”,
Barringer, H. Paul 1996d, “Weibull failure database”,
Barringer, H. Paul and David P. Weber 1995, “Where’s My Data For Making Reliability
Improvements”, Fourth International Conference on Process Plant Reliability, Gulf Publishing
Company, Houston, TX.
Bloch, Heinz P. and Fred K. Geinter 1994, Practical Machinery Management for Process Plants,
nd
Volume 2: Machinery Failure Analysis and Troubleshooting, 2
Edition, Gulf Publishing
Company, Houston, TX
Bloch, Heinz P. and Fred K. Geitner 1995, “Simplified Life-Cycle Cost Computations Applied in
the Hydrocarbon Processing Industries”, Fourth International Conference on Process Plant
Reliability, Gulf Publishing Company, Houston, TX.
Fabrycky, Wolter J., Benjamin S. Blanchard 1991, Life-Cycle Cost and Economic Analysis,
Prentice-Hall, Englewood Cliffs, NJ.
Goble, William M., 1992, Evaluating Control Systems Reliability, Instrument Society of America,
Research Triangel Park, NC 27709.
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