A Comparison of Various Methods Used to Determine the Sample Size Requirements for Meeting a 90/90 Reliability Specification

Abstract

A common rule of thumb used in binomial-outcome reliability studies is that 22 trials with zero failures are needed to conclude a 90% minimal success rate with 90% confidence. This report explores the origins of this rule and shows how it is overly conservative. Alternative methods for constructing lower confidence bounds for binomial proportions are described which allow the 90/90 reliability criteria to be achieved with as few as 13 trials.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2011
Accession Number
ADA540716

Entities

People

  • David W. Webb

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acceptance Tests
  • Binomials
  • Confidence Limits
  • Data Science
  • Discrete Distribution
  • Information Science
  • Materials
  • Military Research
  • Probability
  • Quality Control
  • Random Variables
  • Reliability
  • Sampling
  • Specifications
  • Standards
  • Statistics
  • Test Methods

Readers

  • Regression Analysis.