Accession Number:

AD0894745

Title:

Impact of Dynamic Reliability on Airborne ASW Search: A General Approach and a Case Study of the P-3C.

Descriptive Note:

Final rept. Jun 71-Apr 72,

Corporate Author:

ANALYTIC SCIENCES CORP ARLINGTON VA

Personal Author(s):

Report Date:

1972-04-14

Pagination or Media Count:

133.0

Abstract:

This study examines the impact of catastrophic and degradative equipment failures on systems effectiveness, using the P-3C aircraft as an example. The methods are generally applicable to systems having many independent sensors and weapons where the loss of any particular equipment does not necessarily reduce system effectiveness to zero. The major problem in assessing the impact of equipment failure results from the fact that an ASW mission has a complex time history. detection, localization and attack may occur at virtually any time throughout the mission. Therefore the timing of equipment failures is important, since an early failure of a critical sensor causes a much greater reduction in effectiveness than a late one. A series of simplied models are developed to illustrate the time-dependent effects of failure. Using these models with actual failure data for the P-3C, results suggest that current reliability experience reduces potential system effectiveness on the order of 25 or less. A new approach to the problem of estimating failure effects is attempted. The fractional cost concept yields a precise measure of the importance of each equipment to mission success.

Subject Categories:

  • Patrol and Reconnaissance Aircraft
  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE