Page 313 - Improving Machinery Reliability

Life Cycle Cost Studies 283

I
Sched & Unsched Facility Usage Disposal Costs
Maintenance Costs
I

Energy Costs & Permits & Legal Costs
Facility Usage Costs Allowing Disposal

support & Supply WreckingIDisposal
Maintenance Costs Costs

4 Operationscosts I u
Remediation Costs

Ongoing Training For
Maint. & Operations Recovery Costs

u

Documentation Costs Management Costs Green & Clean Costs

Figure 5-8. Sustaining cost tree.

There probably are special categories under each item of acquisition cost and sus-
taining cost. Building a pulp and paper mill or modifying coker drums at a refinery
to prevent characteristic overstress that occurs during quench cycles would have dif-
ferent cost structures than those used for building a nuclear reactor. Include the
appropriate cost elements and discard the elements that do not substantially influ-
ence LCC. Consider these alternative LCC models as descried by Raheja (1991):

1. LCC = nonrecurring costs + recurring costs
2. LCC = initial price + warranty costs + repair, maintenance, and operating costs
to end users