6.80. The actual decision making process depends on the legislative and regulatory framework, and will often involve interested parties such as the local population. The safety case represents a key input to this process and should, therefore, be used to assist in reaching decisions on how to ensure the safety of a new facility or to upgrade the safety of an existing facility. Consequently, the whole range of activities necessary to develop the safety case, including all steps in the conduct of the supporting safety assessment, should satisfy the following:@@- All safety aspects relevant for later decision making should be addressed in the safety case. This includes the assessment of radiation risks as well as of other factors of influence for decision making about the practicability and acceptability of intended activities.@@- Relevant factors of influence for decision making should be investigated to a sufficient level of detail, using adequate methodologies. The main considerations are that relevant impacts should not be underestimated but also, in particular in existing situations, that an overestimation of risks and other important detrimental factors should be avoided, to the extent practicable, in order not to trigger the implementation of unnecessary measures.@@- Efforts (e.g. for data collection and modelling) should be focused on factors of relevance for later decision making, so that time and financial resources are not wasted.@@- The assessment results as well as additional arguments and considerations presented in the safety case should be sufficient to derive and justify decisions on the actions to be taken. A sufficient basis should be provided for the assessment of compliance with regulatory requirements, for decisions on the inclusion of other relevant factors, for the balancing of benefits and detriments of available options as a basis for selecting options to be implemented (this is relevant in particular for decision making for existing facilities), and for the building of confidence in the reliability of the assessments performed and in the adequacy and safety of the actions proposed in the safety case.