Determining the Total Ship Reliability Distribution,

reportActive / Technical Report | Accession Number: ADA142385 | Open PDF

Abstract:

Acquisition cost and reliable equipment performance are two primary considerations in procurement decisions for ships and ship systems. An important question in this decision process is, how does the variation in equipment failure rate performance quality effect the satisfactory operation of the total system. Until recently the effect of equipment performance quality has been difficult to predict. A new method of analysis has been developed which models variation in equipment failure rate 1 Mean Time Between Failures MTBF with the gamma distribution, calculates the systems response to this MTBF variation, and replicates the performance of the parent distribution with the cumulative beta distribution. Once determined, the cumulative beta distribution enables the engineer or naval architect to easily calculate the upper and lower limits of performance for the parent reliability distribution. The distribution of MTBFs for 115 identical commercial computers is shown as an illustration of equipment performance quality variation discussed. Example cases using the gamma and beta distributions are shown to demonstrate ease of use.

Author(s):
Hartman, P. ; Luetjen, P. ; Buckberg, M.
Author Organization(s):
ASSOCIATION OF SCIENTISTS AND ENGINEERS OF THE NAVAL SEA SYSTEMS COMMAND WASHINGTON DC
Supplementary Note:
Presented at the Annual Technical Symposium (21st), Association of Scientists and Engineers of the Naval Sea Systems Command, Washington, DC, 1984. See also AD-A142 384, AD-A142 386 and AD-A142 387.
Pagination:
0032

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_4_Logistics; JCA_5_Command and Control; JCA_4.3_Maintain; JCA_6.4.1_Secure Information Exchange; JCA_5.3_Planning; JCA_1.4.1_Force Health Protection; JCA_1.4_Force Support; JCA_1_Force Support; JCA_6.4_Information Assurance; JCA_6_Net Centric
Modernization Areas:
Microelectronics
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*COMPUTERIZED SIMULATION, *SHIPS, *RELIABILITY, *MATHEMATICAL PREDICTION, MATHEMATICAL MODELS, COMPUTATIONS, DISTRIBUTION, PERFORMANCE(ENGINEERING), FAILURE, RATES, MAINTAINABILITY, AVAILABILITY, QUALITY, QUALITY CONTROL, SPARE PARTS
Field(s)/Group(s):
Numerical Mathematics, Manufacturing and Industrial Engineering and Control of Production Systems, Marine Engineering
Keyword(s):
MTBF(Mean Time Between Failure)
Report Date:
1984 Mar 01