Accession Number:

ADA021953

Title:

A Simulation Study of Methods for Estimating Availability for Exponentially Distributed Operating Times and Log-normally Distributed Repair Times.

Descriptive Note:

Technical rept.,

Corporate Author:

ARMY MISSILE COMMAND REDSTONE ARSENAL ALA DIRECTORATE FOR PRODUCT ASSURANCE

Personal Author(s):

• Nordman,Joseph Henry

Report Date:

1975-11-01

Pagination or Media Count:

29.0

Abstract:

This study seeks to determine the superiority of various methods for estimating intrinsic availability from demonstration test with equal numbers of operating times and repair times. A total of 31 methods are investigated. The parameters used to simulate availabilities are for exponentially distributed operating times and log-normally distributed repair times and are in a range that is of interest to users of modern weapon systems. The conclusion is reached that no advantage is possible for one estimating procedure as opposed to another. As a result of the knowledge gained in this study, a set of confidence graphs useful for designing availability tests were constructed.

Descriptors:

• *RELIABILITY
• *STATISTICAL ANALYSIS
• COMPUTERIZED SIMULATION
• STOCHASTIC PROCESSES
• WEAPON SYSTEMS
• ESTIMATES
• CONFIDENCE LIMITS

Subject Categories:

• Statistics and Probability
• Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE