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RAW MATERIALS. Material that the facility receives but has not performed any process on.
RECEIVING. This function includes the physical receipt of material, the inspection of the shipment for conformance with the purchase order (quantity and damage), identification and delivery to destination, and preparing receiving reports.
RECONCILING INVENTORY. Comparing the physical inventory figures with the perpetual inventory record and making any necessary corrections.
REGENERATION MRP. An approach where the master production schedule is totally re-exploded down through all bills of material at least once per time period, i.e. week, to maintain valid priorities. New requirements and planned orders are completely "regenerated" at that time. (See NET CHANGE MRP, REQUIREMENTS ALTERATION.)
RELEASE. The authorization to produce or ship material which has already been ordered. (See BLANKET ORDER.)
RELEASED ORDER. (See OPEN ORDER.)
REORDER POINT. (See ORDER POINT.)
REORDER QUANTITY. In a fixed reorder system, the quantity which should be ordered each time the available stock (on hand plus on order) falls below the order point. However, in a variable reorder system the amount ordered from time period to time period varies. (See ECONOMIC ORDER QUANTITY, LOT SIZE.) Syn: replenishment order quantity.
REPAIR PARTS DEMAND. (See sERVICE PARTS DEMAND.)
REPETITIVE MANUFACTURING. Production of discrete units, planned and executed via a schedule, usually at relatively high speeds and volumes. Material tends to move in a sequential flow.
REPETITIVE MANUFACTURING. The total period of time that elapses from the moment it is determined that a product is to be reordered until the order is available for use.
REQUIREMENTS ALTERATION. Processing a revised master production schedule in order to review the impact of the changes. Not to be confused with net change, which, in addition to changes to the master production schedule, also processes changes to inventory balances, bill of material, etc. Typically used in MRP systems. (See NET CHANGE MRP, REGENERATION MRP.) Syn: alteration planning.
REQUIREMENTS EXPLOSION. A method of calculating future demand for an item. Future production quantities are multiplied by the quantity in the bill of material. The results represent future demand. (See DEPENDENT DEMAND, GROSS REQUIREMENTS, MATERIAL REQUIREMENTS PLANNING.)
RESCHEDULING. The process of changing order or operation due dates, usually as a result of changing priorities.
RESCHEDULING ASSUMPTION. A fundamental piece of MRP logic which assumes that existing open orders can be rescheduled into nearer time periods far more easily than new orders for the same product can be released and received. As a result, planned order receipts are not created until all scheduled receipts have been applied to cover gross requirements.
RESERVATION. The process of designating stock for a specific customer order. (See ALLOCATION.)
RESOURCE PLANNING. (See LONG-RANGE RESOURCE PLANNING.)
RESOURCE PROFILE. (See PRODUCT LOAD PROFILE.)
RESOURCE REQUIREMENTS PLANNING. The process of converting the production plan and/or the master production schedule into the demand on key resources. Product load profiles or bills of resources can be used to accomplish this. The purpose is to evaluate the plan prior to attempting implementation. (See CLOSED-LOOP MRP.) Syns: rough-cut capacity planning, rough-cut resource planning.
REWORK LEAD TIME. The time required to rework material in-house or at a supplier.
REWORK ORDER. A manufacturing order to rework and salvage defective parts or products. Syns: repair order, spoiled work order.
ROUGH-CUT CAPACITY PLANNING. (See RESOURCE REQUIREMENTS PLANNING.)
ROUGH-CUT RESOURCE PLANNING. (See RESOURCE REQUIREMENTS PLANNING.)
RUN TIME. The standard hours allowed to perform an operation on one item. The actual time taken to produce one piece may vary from the standard but the latter is used for loading purposes and is adjusted to actual by dividing by the appropriate work center efficiency factor.
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