BRF (Best Replacement Factor) Computation Study. Revision,
Abstract
An item's Best Replacement Factor (BRF) is the annual rate, per unit of installed population, at which the item is replaced because of failure or maintenance actions. Each year the BRF is updated to reflect the latest reported usage. A new BRF is produced by computing a smoothed or weighted average between the item's current BRF and the item's usage per unit population that was experienced during the last year. A review of several years of updates indicate that there are continuing problems with the current system. An alternative proposed method computes BRFs as the ratio of an item's total lifetime usage to the sum of the item's yearly average populations. A third method of computing BRFs which utilizes an Adaptive-Response-Rate Single Exponential Smoothing (ARRSES) procedure is also considered. These methods of computing BRFs are compared to determine which produces the most accurate estimates of future usage. Additionally, BRFs produced by the most promising methods are used to build a series of Coordinated Shipboard Allowance Lists (COSALs) for three test ships. The COSALs are compared and differences in range, cost, stock churn and supply effectiveness caused by the different types of BRFs are identified, quantified and evaluated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1986
- Accession Number
- ADA170600
Entities
People
- Harry M. Lehn