Production Planning and Control
Production Planning and Control
Material Requirements Planning
components quantities are needed and #hen$
Requires:
%Inventory status
%)ead times
Assumptions
2$ Infinite capacity$
Idea is to 34ac1 out5 demand for components 4y using
leadtimes and 4ills of material$
 
MRP Procedure
2. Lot Sizing: planned order quantities
3. Time Phasing: planned orders 4ac1ed out 4y leadtime
4. B! "#$%osion: gross requirements for components
 
Inputs
 7  !aster Pro'ution She'u%e (!PS): due dates and
quantities for all top level items
 7  Bi%%s o !ateria% (B!): for all parent items
 7  *n+entor, Status: 'on hand plus scheduled receipts( for all
items
 
Material Requirements Planning
Period , . 2 ; : < = >
&99 > . . 9 9 9 9 9
?,9 . . , , 9 9 9 9
 
Material Requirements Planning
80ample ime , . 2 ; : < = >
&I 9 . , 9 9 9 9 9
 @R -. -, ,, ,< ,: ,. ,> ,;
P+R8 ,, ,< ,: ,. ,> ,; A A
Material Requirements Planning
o# many Cs #ill 4e affected
o# can #e fi0 the pro4lem
 
Rough Cut Capacity Planning 'RCCP(
 7  *uic1 chec1 on capacity of 1ey resources
 7  se &ill of Resource '&+R( for each item in MPS
 7  !enerates usage of resources 4y e0ploding MPS against &+R
'offset 4y leadtimes(
 7  Infeasi4ilities addressed 4y altering MPS or adding capacity 'e$g$"
overtime(