Work Validation is one of the key factors to a successful shutdown or outage. Validation is addressing a series of questions about all the jobs on the work list. Its purpose is to get rid of all unnecessary work, describe all jobs and do away with duplications. A few questions need to be answered for every job such as Does the work have to be done during this shutdown?, Will the job be undone by a job later in the shutdown?, Is this routine work being transferred into the shutdown?. Validation process consists of three steps. They are Check: duplication, approval, request is accurate, Challenge: the need to perform the task either at all or during this shutdown, Analyze: safety, quality, engineering, material, resource requirements.