Document: NUREG-0800
Document ID: a2598df1-7ec6-43a6-9d2a-d8210d1f944f
Document Type: srp
Title: through 7.9. Additional information relevant to the review process can be found in the references in
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500461.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
process for auditing the implementation process. Figure 7.0-A-5 identifies the software life cycle process implementation topics that should be considered as candidates for audit. BTP HICB-14, Section B.3.2, describes the acceptance criteria for software life cycle process implementation. The scope and depth of the inspection should be consistent with the extent and complexity of the proposed digital system and the potential safety impact of system failure. For simple, limited, low-impact retrofits to existing systems, the process audit may be a very limited-scope "desk audit" of selected examples of process documentation. Review of extensive digital I&C systems, such as an integrated digital control and protection system, should involve detailed reviews of a wide range of software process documentation. Ideally, these reviews would occur in process audits of several of the life cycle phases, as indicated in Figure 7.0-A-5. The audit of a given set of life cycle activities and the Rev. 4 — June 1997 SRP 7.0-A-12 inspection of products generated by those activities, as discussed in Section C.3.7 below, may be combined into a single audit. One effective audit technique is the string audit, in which the reviewer selects a sample of specific software development process requirements and specific functional requirements and confirms that they are implemented throughout the life cycle. C.3.7. Audit of Software Life Cycle Process Design Outputs The products of a design process include both the design outputs that describe the technical requirements of systems and components, and the systems and components themselves. The review of digital systems should include inspection of these products on an audit basis to confirm that the systems and components meet the functional requirements. Figure 7.0-A-9 provides an overview of the process for inspection of design outputs. Candidate items for inspection include the items described in Appendix 7-B, BTP HICB-17, HICB-21, and