Detailed project report is base document for planning the project and implementing the project. Preparation of detailed project report is a step in firming up the proposal. When an investment proposal has been approved on the basis of functional report and the proposal is a major proposal, it would be necessary for detailed project report to firm up the proposal for the capital cost as well as the various facilities.
Hence these reports are to be made before investment is made into project. Thus formulation of investment is based on the studies made. These can be considered as pre-investment decision. Detailed project report is prepared only for the investment decision-making approval, but also execution of the project and also preparation of the plan. Detailed project report additionally includes contents of Feasibility study reports: