For programmes, the programme business case would need to be assessed every time a new tranche or programme phase begins and when significant project stages or other work are started. The initial business case does not comprise a full analysis but only sufficient detail to enable one to decide if it is worth continuing. The initial business also enables the evaluation of the work against the existing strategies and goals of the company to confirm its strategic fit and determine if it is likely to be viable in business, technical, operational and customer terms. The full business case provides the definitive appraisal for the programme or project. It is derived from the initial business case and feasibility report, together with the outputs from other investigative work. A programme's business cases should follow the same principles as a project's business case as it serves the same purpose, namely to justify the work being undertaken.