In the contract programming scheme, the mission you give us is very precise and thoroughly detailed.

We settle on a goal to achieve, on a defined timeline, and then we build up the project.
On schedule.
According to the specifications.

If requested, we will show off the evolution of the development at selected milestones.

Of course, we can take in charge all or part of the I.T. design, but we can also write up the documentation, perform the final checks and tests, customize an existing application, or draft the specifications.

As opposed to the delegation scheme, this scheme assumes that the description of the job is accurate, and is not evolutive. It may be the natural following of a consultancy mission.