ISO/IEC 15026-4:2012 gives guidance and recommendations for conducting selected processes, activities and tasks for systems and software products requiring assurance claims for properties selected for special attention, called critical properties. ISO/IEC 15026-4:2012 specifies a property-independent list of processes, activities and tasks to achieve the claim and show the achievement of the claim. ISO/IEC 15026-4:2012 establishes the processes, activities, tasks, guidance and recommendations in the context of a defined life cycle model and set of life cycle processes for system and/or software life cycle management.