Communication Mediums for Signal, ITS, and Freeway Surveillance Systems Final Report (1996) / Chapter Skim
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A.5.3 Life Cycle Cost Analyses and Evaluation of a Technology
A.5.3 Life Cycle Cost Analyses and Evaluation of a Technology
Pages 505-513
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From page 505... ...
A.5.3 Life Cycle Cost Analyses and Evaluation of a Technology The tree cost of a technology is not just the cost of procurement. It includes all costs associated wad the acquisition, installation, testing, maintenance and operations of Be equipment over its expected life cycle.
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From page 506... ...
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From page 507... ...
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From page 508... ...
In InteNigent Transportation Systems travel time to a field site can be significant compared wig actual corrective action time at the site of the failure. The benefits of fault tolerance must be considers on a system level basis to determine Be probably number of failures Cat could be combined into one maintenance field trip and Be resulting savings achieved compared wig one top per failure.
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From page 509... ...
to accomplish the repair; Travel to the failure site; Setting up at the site for maintenance activity; Accessing He cabinets containing He suspected failed module; Accomplishing any on-site diagnosis to verify isolation and identification of the failed module; I Replacing He failed module; Verifying He failure has been repaired; Cleaning up He repair site and packing test equipment; · Logging repair activity; and Retuming to the maintenance shop.
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From page 510... ...
Thus, spares replacement cost must be included in life cycle cost based on the MTBF of a specific type PCB (i.e., part number) , He number of specific PC13s in He system and He number of spares ong~naDy ordered.
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From page 511... ...
Where a quality manufacturer is used, generally more reliable board-level repair is obtained by contact depot maintenance compared wig "do it yourself' junsdictional maintenance. The reasons are Mat Me manufacturer has: · Much more sophisticated test equipment for failed component isolation and repaid PCB operation validlation; Formal quality test procedures; and Formal certification of cost of test equipment supporting component level troubleshooting and repair.
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From page 512... ...
By using depot level maintenance for PCB repair to the component level, the following jurisdictional costs are eliminated: Actual depot repair coil changed by the contractor; and Cost of resolving any unacceptable repair quality problems wig the supplier of depot maintenance services. As can be seen, calculations of life cycle cost can be very complex depending on the level to which Be analysis is taken.
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From page 513... ...
Depot maintenance cost can have significant variation based on Be manufacturer's use of separate contract maintenance facilities, its production test facilities, or Bird party maintenance. Similarly, PCB board-level maintenance cost may be Impacted by shipping cost to depot facilities.
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