System is developed based on understanding of the user requirement collected, system and functional specification agreed and written down before. In most cases, the final product is somehow different from user expectation and there are issues or bugs found due to misunderstanding, new issue discovered or whatever reason.

User Acceptance Test is to find out the gap between the development and the user team, and make sure all potential issues are identified and solved before production rollout. To achieve this, it must be carefully planned and ensure all scenario are tested.

The purpose of this book is to list out all the tasks that need to be done, including all the detailed steps, so as to help the staff to understand the whole process and complete their work on hand.