Which business document is a contract that defines the tasks, time frame, and deliverables that a vendor must perform for a client?

The statement of work is a contract that defines the tasks, time frame, and deliverables that a vendor must perform for a client.

There are several things that will be written in the statement of work in order to manage the deal, such as the name of the project, the timeline for the project, the project handler, the delivery method, etc.