Next time you are in a shop look around and ask how many times jobs are interrupted cause of the absence of something? This something could be anything from a spare part to a piece of equipment. Resources are the essential things needed for maintenance work. They could be anything from labor, to space in a yard. Anything required to finish a job is a resource. Lack of a resource means either the job is abandoned or delayed. It is important to make a list of the resources necessary to do all different kinds of maintenance jobs on both mobile and stationary equipment. A good solution is to create a schedule to manage the resources with time.