On what basis is the Acceptance plan prepared?

In any project, Acceptance document is normally prepared using the following inputs. This can vary from company to company and from project to project.

• Requirement document: This document specifies what exactly is needed in the project from the customer perspective.
• Input from customer: This can be discussions, informal talks, emails etc.
• Project Plan : Project plan prepared by the project manager also serves as a good input to finalize acceptance test.

In projects, Acceptance test plan can be prepared by numerous inputs. It is not necessary that the above list is the only criteria. So if the reader thinks that he/she have something extra to add , please go ahead.