8/9/2019 Difference Between MRP vs MPS

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Difference between MRP vs MPS 

Explain the difference between MRP & MPS. Though both components gives

ou the re!uirement list" what we gain out of MPS run rather than running

MRP. #hat is the main idea behind this$ 

The following might help in explaining the difference between MPS and its

counter part MRP.

Master Production Schedule %MPS '

MPS operates within only one level of the BOM !hile MRP can be utili"ed

throughout all levels of a material#s BOM. $f a MPS is run on a material the

necessary orders are planned at that level. %ependent re&uirements 'if any( are

 placed on the next BOM level down and then the process stops.

Main $dea ) Master production scheduling 'MPS( is a form of MRP that

concentrates planning on the parts or products that have the great influence on

company profits or which dominate the entire production process by ta*ing critical

resources. These items are mar*ed as +,# parts 'MPS items( and are planned with

extra attention. These items are selected for a separate MPS run that ta*es place

 before the MRP run. The MPS run is conducted without a BOM explosion so that

the MRP controller can ensure that the Master schedule items 'MS$( are correctly

 planned before the detailed MRP run ta*es place.

The master production schedule is a line on the master schedule grid that reflectsthe anticipated build schedule for those items assigned to the master scheduler. The

master scheduler maintains this schedule and in turn it becomes a set of planning

numbers that drives material re&uirements planning. $t represents what the

company plans to produce expressed in specific configurations &uantities and

dates. The master production schedule is not a sales item forecast that represents a

statement of demand. The master production schedule must ta*e into account the

forecast the production plan and other important considerations such as bac*log

availability of material availability of capacity and management policies and

goals. Syn) master schedule.

Material Re!uirements Planning %MRP '

, set of techni&ues that uses bill of material data inventory data and the master

 production schedule to calculate re&uirements for materials. $t ma*es

recommendations to release replenishment orders for material. -urther because it

is timephased it ma*es recommendations to reschedule open orders when due

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dates and need dates are not in phase. Timephased MRP begins with the items

listed on the MPS and determines

'/( the &uantity of all components and materials re&uired to fabricate those items

and

'0( the date that the components and material are re&uired. Timephased MRP is

accomplished by exploding the bill of material ad1usting for inventory &uantities

on hand or on order and offsetting the net re&uirements by the appropriate lead

times.

MRP (nterview )uestions' 

#hat is the need of mrp list if stoc* re!uirement list is alread there$  

The MRP list displays the result of the last planning run. 2hanges that have

occurred between planning runs are ignored in the MRP list. $n contrast to this

the system displays all changes in stoc* receipts and issues which have currently

occurred in the stoc*3re&uirements list.

#hich tcode are used to run MRP$ 

M%4/ is generally used to run the MRP for all the materials in a plant normally

 1ust before golive.

M%40 is used to run MRP for materials which have a BOM i.e multilevel. M%45 is used to run MRP for materials which do not have a BOM i.e single

level.