This part of ISO/IEC 15026 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. This part of ISO/IEC 15026 specifies a propertyindependent list of processes@ activities and tasks to achieve the claim and show the achievement of the claim. This part of ISO/IEC 15026 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. NOTE The stakeholders determine which of the system or software properties are selected for special attention and require assurance claims. This part of ISO/IEC 15026 uses the term ??critical?? to distinguish those properties from other requirements.