Arbeitsvorbereitung, work preparation, is a fixed term in German manufacturing and construction. In construction, it is the planning stage that coordinates resources, tasks and work steps, so that the work on site runs efficiently and without disruption. The construction reference work Bauprofessor calls careful work preparation decisive for the success of a building project. It warns that leaving it out can cost five percent or more of the result on a site. In industry, Arbeitsvorbereiter, work preparer, is a job title of its own. One way into the job is a twelve-week course to become a REFA technician.