Preservation planning involves defining preservation criteria based on risk analysis of organizational context and digital objects. It follows a systematic process to develop preservation plans by evaluating available strategies against criteria. The goals are to support decision-making, formulate high-quality and cost-effective plans, and enable execution of preservation actions. The Planets approach understands user needs and policies through interviews and develops a decision support tool to select best strategies based on collection profiles and requirements. Plans trigger automated preservation actions and are re-evaluated periodically with technology changes.