4.61. The requirements on the management system influence the development of the safety case in two ways. First, the description of the management system applying to the various stages of facility development should represent an important element of the safety case, contributing to the confidence that the relevant requirements and criteria for site selection, design, construction, operation, closure and post-closure safety are met. Second, programmes should be set up to ensure the quality of all activities associated with the safety case and safety assessment, such as data collection and modelling. This aspect is discussed in para. 4.39.