How to manage Project Deliverables

The first document to create (generally speaking) is the business case or something that has the enough information to convince people to invest into the initiative. If the business case is approved then the project is started and the next step is to create the project charter. So, while there is not an standard related the format of the business case document, depending the organization, I think that costs and benefits about the initiative must be included if and only if are valuable information to give to people that must be accept or reject it. It is important to consider the degree of accuracy you will get on the costs and other things included due the the amount of information you have. To deal with that my recommendation is taking a look to Barry Bohem´s Cone of Uncertainty.