Pauline van Goethem & Brian Hambling 
User Acceptance Testing [PDF ebook] 
A step-by-step guide

Every information system brought into service in every type of organisation requires user acceptance testing. It is by far the most common activity carried out by non-IT specialists. This book is designed to be a hands-on manual for non-testing specialists to plan and carry out an effective acceptance test of an information system. It provides a structured and step-by-step approach to effective acceptance testing and identifies ways of making the process as simple and cost-effective as possible.