IEC 60409:1981

Contents
Foreword
Preface
Clause
1. Object
2. Scope
3. Introduction
    3.1 Approach A - Reliability compliance testing
    3.2 Approach B - Reliability determination testing
4. Definitions (in addition to those in IEC Publication
    271)
5. Information to be included in specifications
    5.1 Basic control concept
    5.2 Statement of objectives
    5.3 Test method
    5.4 Criteria of failure
    5.5 Periodicity of test
    5.6 Failure-in-time distribution
    5.7 Accumulation of data (applicable in series lots
         only)
    5.8 Exclusion of data
    5.9 Statement of test results
    5.10 Qualification approval procedure
    5.11 Determination of sample size
    5.12 Maintenance or withdrawal of qualification
         approval
6. Assessed failure rate
7. Reliability testing methods
    7.1 Methods depending upon the distribution of
         failures with time
    7.2 Fixed failure number testing
    7.3 Tightened limits testing
    7.4 Variables testing
8. Checklist of factors to be considered when preparing a
    reliability specification.

Guides writers of specifications and Technical Committees in the consideration of factors which should be taken into account in the inclusion of quantitative reliability clauses in specifications. Applies mainly to the case where a constant failure rate is assumed.