Already a subscriber? 
MADCAD.com Free Trial
Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.
If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.
Security check
Please login to your personal account to use this feature.
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?
BS EN IEC 61123:2020 Reliability testing. Compliance test plans for success ratio, 2020
- undefined [Go to Page]
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, abbreviated terms and symbols [Go to Page]
- 3.1 Terms and definitions
- 3.2 Abbreviated terms and symbols [Go to Page]
- 3.2.1 Abbreviated terms
- 3.2.2 Symbols
- 4 General requirements and area of application [Go to Page]
- 4.1 Reliability requirement
- 4.2 Repair and replacement
- 4.3 Types of test plans [Go to Page]
- 4.3.1 General
- 4.3.2 Features of the test plan types
- 4.4 General test procedure
- 4.5 General decision criteria
- Figures [Go to Page]
- Figure 1 – Expected and maximal number of trials for SPRT and FTFT with the same risks
- Tables [Go to Page]
- Table 1 – Overview – Maximal number of trials and expected number of trials at p0 for SPRT and FTFT
- 5 Truncated sequential probability ratio test plans (SPRT) [Go to Page]
- 5.1 Characteristics
- 5.2 Decision criteria
- Table 2 – Range of the test parameters
- 5.3 Operating characteristic curve (OC)
- Figure 2 – SPRT diagram
- Table 3 – OC curve
- 5.4 Expected number of trials to decision (ENT)
- Figure 3 – OC curve
- Figure 4 – SPRT – Curve of expected number of trials to decision (ENT)
- Table 4 – ENT (ne) versus true failure ratio (p)
- 6 Fixed trial/failure terminated test plans (FTFT) [Go to Page]
- 6.1 Characteristics
- 6.2 Decision criteria
- Table 5 – Fixed trial/failure terminated test plans
- 7 Design of fixed trial/failure terminated test plans [Go to Page]
- 7.1 Characteristics
- 7.2 Approach
- 7.3 Common case
- 7.4 Other cases
- 7.5 Example of application
- 7.6 Procedure to determine D and c or n and c [Go to Page]
- 7.6.1 Figure and table readings
- 7.6.2 Use of figures and tables
- 7.7 Decision criteria
- Figure 5 – Principal layout of Tables E.1 to E.3
- Annex A (informative)Additional information on sequential test plans [Go to Page]
- A.1 Example
- Figure A.1 – Example of a truncated sequential test
- A.2 Extension of the test set (through interpolation and extrapolation) [Go to Page]
- A.2.1 General
- A.2.2 Extrapolation for p0 < 0,001
- A.2.3 Interpolation
- Table A.1 – Example for interpolation by α and β
- Annex B (informative)Design of fixed trial/failure terminated test plans − Examples [Go to Page]
- B.1 Use of figures and tables
- B.2 Case where number of events, n, is not known, but is predictable
- Annex C (informative)Design of fixed trial/failure terminated test plans –Mathematical procedures and formulas [Go to Page]
- C.1 General
- C.2 Symbols
- C.3 Computation [Go to Page]
- C.3.1 Determination of D versus n
- C.3.2 Determination of n and c versus p0, D, α, β
- C.3.3 Test without failures – Determination of n and D versus p0, α, β
- C.3.4 Determination of OC curves
- C.3.5 Determination of inverse OC curves
- C.4 Accuracy
- C.5 Tables of cumulative normal distribution and its Inverse
- Table C.1 – Cumulative normal distribution for fixed uγ values
- Table C.2 – Inverse cumulative normal distribution for fixed 1 − γ values
- Annex D (normative)Truncated sequential test plans [Go to Page]
- Table D.1 – Truncated sequential test plans
- Annex E (informative)Design of fixed trial/failure terminated test plans – Figures and tables to determine D and c or n and c [Go to Page]
- Figure E.1 – Discrimination ratio, D, versus number of events, n for p0 = 0,05
- Figure E.2 – Discrimination ratio, D, versus number of events, n for p0 = 0,10
- Figure E.3 – Discrimination ratio, D, versus number of events, n for p0 = 0,15
- Table E.1 – Acceptable number of failures, c, versus number of events, n for p0 = 0,05 (1 of 2)
- Table E.2 – Acceptable number of failures, c, versus number of events, n for p0 = 0,10 (1 of 2)
- Table E.3 – Acceptable number of failures, c, versus number of events, n for p0 = 0,15 (1 of 2)
- Bibliography [Go to Page]
