(1.1)  Output specification.

The OBC should include a first draft of an Output Specification which should be set out as a clear definition of the objectives and outputs needed, with the standards required (rather than particular assets or solutions). This is a key characteristic of PFI contracts and allows for innovation and efficiency on the part of the private sector. The specification should be based on best practice and precedent from similar projects, and be consistent with affordability assumptions. An illustrative solution will generally be needed in order to undertake the necessary financial analysis, but it should be clear that this does not constrain the final solution.