ECONOMIC DECISION CRITERIA FOR REPAIR VERSUS THROWAWAY MAINTENANCE.
Abstract
The purpose of this study was to aid the designer in minimizing the total cost of an equipment during its useful lifetime where total cost is taken to include initial procurement, maintenance, and logistics and to provide criteria for designating the maintenance decision of shipboard repair, depot repair, or throwaway for a module which has already been designed. Mathematical models and graphs were derived which use electronic assembly parameters such as failure rate, assembly cost, etc., to give an economic comparison of using the different maintenance procedures for the repair of an assembly. The general total cost model presented should provide reasonably accurate decisions and total cost differences with respect to repair or throwaway. The accuracy of the model is dependent upon the accuracy of the average values used for the adjustment factors and logistic constants. Three limits defined by this model are: (1) modules costing less than $120 can be economically thrown-away, (2) modules having total parts cost less than $35 can be economically thrown away and modules having total parts costs greater than $800 should be repaired, and (3) the repair or throwaway decision is independent of module failure rate, if no variation in module procurement costs exists. The magnitude of the cost difference is dependent on module failure rate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 29, 1964
- Accession Number
- AD0455102
Entities
People
- O. E. Davis