scope:

This part of the Def Stan provides a description of the principles of the R&M Case and provides guidance on its content and application through the life of a system. The R&M Case is intended to be used throughout the acquisition cycle from concept throughout the Concept, Assessment, Demonstration, Manufacture, In-Service and Disposal (CADMID) acquisition cycle phases. This part of the Def Stan is not intended to provide guidance on how to contract for progressive R&M assurance or the R&M Case.

This Def Stan has five main Sections which describe:

a) The principles of the R&M Case (Clause. 5)

b) The application of the R&M Case through the system life cycle (Clause. 6)

c) Providing the evidence (Clause. 7)

d) Guidance on how to present the evidence (Clause. 8)

e) Guidance on how to assess the adequacy of the evidence (Clause. 9) The activities required for the achievement of R&M will depend on the nature and maturity of the system and are likely to vary significantly from one project to another. 

Annex A describes the general requirements for the R&M Case and R&M Case Report. The guidelines in Annex A should not be considered as being prescriptive in nature as they are generic and do not attempt to be exhaustive. 

Annex B provides examples of R&M risks at different stages of a system's life cycle. 

Annex C provides a checklist of points for assessing the adequacy of evidence. The checklist should not be considered to be prescriptive or exhaustive; it is generic and provides guidance to supplement the generic guidance provided in Clause 9. 

Annex D describes the R&M risk reduction process shown in Figure 8 using illustrative examples where appropriate. 

Annex E describes the R&M Evidence Framework, expanding on the information given in Clause