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GB/T 39844-2021Reliability growth - Statistical test and estimation methods (English PDF)

可靠性增长统计试验和评估方法

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

March 9, 2021

Implementation date

October 1, 2021

Scope

GB/T 39844-2021 is the English-translated version of 可靠性增长统计试验和评估方法.

GB/T 39844-2021 is the Chinese standard "Reliability growth - Statistical test and estimation methods". Its scope clause reads: This standard provides models and numerical methods for reliability growth assessment based on failure data in reliability improvement work.

These models And numerical methods involve growth, evaluation, product reliability confidence intervals, and product goodness-of-fit tests. Its clauses include terms and definitions.

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Document preview — GB/T 39844-2021

National Standard of the People's Republic of China

Classification: L 05

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbol
5 Reliability growth model in design and test
6 Reliability growth model for the system/product in the design phase
6.1 Modified power law model of reliability growth plan in product design stage
6.2 Modified Bayesian IBM-Rosner Model for Planning Reliability Growth in the Design Phase
7 Reliability Growth Plan and Tracking in Product Reliability Growth Test
7.1 Continuous reliability growth model
7.2 Discrete reliability growth model
8 Plan reliability growth test procedures with a power law model
9 Statistical testing and estimation process of continuous power law model
9.1 Overview
9.2 Growth test and parameter estimation
9.3 Goodness of fit test
9.4 Confidence interval of shape parameter
9.5 Confidence interval of current MTBF
9.6 Forecasting methods
Appendix B (informative appendix) Power-law reliability growth model---background information

1 Scope

This standard provides models and numerical methods for reliability growth assessment based on failure data in reliability improvement work. These models

And numerical methods involve growth, evaluation, product reliability confidence intervals, and product goodness-of-fit tests.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 2900.13-2008 Electrical engineering terminology credibility and service quality [IEC 60050(191).1990,IDT]

GB/T 5080.1-2012 Reliability Test Part 1.Test Conditions and Principles of Statistical Inspection (IEC 60300-3-5.2001,

IDT)

GB/T 15174-2017 Reliability Growth Outline (IEC 61014.2003, IDT)

IEC 60605-4 Equipment Reliability Test Part 4.Point Estimation and Interval Estimation Method for Reliability Test under Exponential Distribution (Equipmentreliabilitytesting-Part 4.Statisticalproceduresforexponentialdistribution-Pointesti- mates,confidenceintervals,predictionintervalsandtoleranceintervals)

IEC 60605-6 Equipment Reliability Test Part 6.Validity Test of the Constant Failure Rate Hypothesis of Equipment Reliability Test (Equipmentreliabilitytesting-Part 6.Testsforthevalidityoftheconstantfailurerateorconstant failureintensityassumptions)

3 Terms and definitions

The following terms and definitions defined in GB/T 2900.13-2008 and GB/T 15174-2017 apply to this document.

3.1 Reliability goal

The expected reliability level of the product after the reliability increase program is over.

3.2 Initialreliability

The reliability level in the early stage of product design, that is, the reliability level before any potential failure modes and causes are designed and improved.

3.3 Reliabilitygrowthmodelforthedesignphase

According to potential design improvements, use mathematical language to describe the increase in reliability from the beginning of the design phase to the end of the design phase

Variety.

3.4 Average product failure rate

Calculated from the estimated reliability in a given time period.

Note. The modification of product design results in a change in the failure rate function with time as a variable.

GB/T 40309 | GB/T 38889 | GB/T 34986 | GB/T 43038 | GB/T 43037 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 64 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60050 · IEC 60300 · IEC 61014.2003 · IEC 60605

Cited by

GB/T 46568.1-2025Intelligent instruments reliability - Part 1: Reliability test and evaluation methods

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