Manufactured Parts created by Engineering, checked by Quality, then from approved revisions, MRP create Unfirmed jobs suggestions based on live demand, then Production / Demand Planner check then firmed these jobs, issue material to them and release them to the shop floor, if material is not in stock, flag jobs for Purchasing and Raw material handler to buy, once arrived same flag used to alert Production Planner to release them to the shop floor, Production supervisor and manager take over day by day operations after until job finish and closed.