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On the Use of Built In Test Effectivity Analysis
Technical Paper
2017-01-2051
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
Testability measures the extent to which a system or unit supports fault detection and fault isolation in a confident, timely and cost-effective manner. The incorporation of adequate testability, including Built-In Test (BIT), requires early and systematic management attention to testability requirements, design and measurement. Whilst the design of BIT has become a standard design practice for a complex control system, the process to measure the effectiveness of such circuitry (both hardware and software) remains qualitative. The Built-In Test Effectivity Analysis (BEA) tries to quantify such analysis at each phase; identifying requirement gaps that help design safer products. The BEA modifies standard reliability programme to use Failure Modes and Effects and Criticality Analysis (FMECA), and reliability prediction of each functional group to generate a measure of how thoroughly the system can check itself. Initially discussed by Collet et al, this method is restricted by assumptions such as exclusion of generic faults and incorruptible BIT circuitry. This paper aims to optimize the present methodology by using a modified Failure Mode Effects Summary (FMES) template to identify and isolate faults that help determine hardware/software requirements that can mitigate BIT circuitry faults as well as generic failures.
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Thanigaivelu, V. and Choksi, S., "On the Use of Built In Test Effectivity Analysis," SAE Technical Paper 2017-01-2051, 2017, https://doi.org/10.4271/2017-01-2051.Data Sets - Support Documents
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References
- DoD, AMSC No. N3423. Testability Program for Electronic Systems and Equipment
- Collet R.E. , Bachant P.W. Integration of BIT Effectiveness with FMECA Proceedings Annual Reliability And Maintainability Symposium, IEEE 1984
- Military Standard 1629A Procedures for Performing a Failure Mode, Effects and Criticality Analysis 24 November 1980
- Coppola Anthony A Design Guide for Built-In-Test (BIT) RADC-TR-78-224 1979
- SAE International Aerospace Recommended Practice “Guidelines for Development of Civil Aircraft and Systems SAE Standard ARP4754A Dec. 2010