Document: NUREG-0800
Document ID: 4f097781-0d4c-4b5b-be06-a3cd19ae9fe8
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660430.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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CFR Title: 

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��those matters resolved in connection with the issuance or renewal of a design certification” within the meaning of 10 CFR 52.63(a)(4). Tier 2 material is approved by the design certification rule, but is not part of the rule. Tier 2 material may be changed by a process similar to that described in 10 CFR 50.59, unless designated as Tier 2* in the SER. Tier 2* - A subset of Tier 2 material that the NRC SER and DCD for the standardized plant design approval identifies as requiring NRC approval prior to modification or change by the applicant/licensee. Timing (as a software functional characteristic) - The ability of the software system to achieve its timing objectives within the hardware constraints imposed by the computing system being used. Traceability - The degree to which each element of one life cycle product can be traced forward to one or more elements of a successor life cycle product, and can be traced backward to one or more elements of a predecessor life cycle product. Unambiguity - The degree to which each element of a life cycle product, and of all elements taken together, have only one interpretation. Unbounded loop - The term used to describe the situation in which a programming language control structure called a loop has no upper limit to the number of times it may execute. Validation - The process of evaluating a system or component during or at the end of the development process to determine whether it satisfies specified requirements [IEEE Std 610.12]. Appendix 7-B-11 Revision 5 - March 2007 Verifiability (as a software functional characteristic) - The degree to which a software design output is stated or provided in such a way as to facilitate the establishment of verification criteria and the performance of analyses, reviews, or tests to determine whether those criteria have been met. Verification and Validation (V&V) - The process of determining whether the requirements for a system or component are complete and correct, the products of