Guidance for Addressing Software Common cause Failure In High Safety-Significant Safety Related Digital I&c systems


Associated First Principles of Protection Against Software CCF



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Associated First Principles of Protection Against Software CCF

DRAFT B - August 2020
© NEI 2020. All rights reserved. nei.org 24

First Principle 6.1 - Software quality depends on complete and correct requirements, design and implementation
10.8.3
Safe Design Objectives
Safe design objectives for achieving application software integration test quality are listed below
10.8.3.1
Using the results of activities performed under SDO 10.5.3.4, application software integration testing is performed using specified test cases, and test data in a specified and suitable environment with specified acceptance criteria.
10.8.3.2
Application software integration tests demonstrate correct interaction between all application software modules and/or application software elements/subsystems.
10.8.3.3
Application software integration testing information includes whether test acceptance criteria have been met, and if not, the reasons why such that corrective actions are specified.
10.8.3.4
During application software integration, any module changes are analyzed for extent of 1) impact to other modules and 2) rework of activities performed under prior SDOs.

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