A plan type in closed-loop MRP, being a plan in the system the timing and quantity of which is specifically under the control of the (human) planner, not of the MRP system itself. A firm planned order may be created by directly changing the plan type of an MRP planned order from planned status to firm status, or may be created ab initio by the planner. The start and finish dates of a firm plan can be directly set by the planner so that the plan can be given a non-standard leadtime.The'FPO may also have a non-standard manufacturing quantity, a non-standard set of immediate components (i.e. non-standard usages) and a non-standard scrap factor. The production controller may create firm plans in order to interject technical reality on the plan overall as produced by MRP, since capacity and scheduling issues are not directly taken account of by MRP.