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Material Requirements Planning (MRP) (MRP shortcomings (ignores…
Material Requirements Planning (MRP)
The vital role of MRP
independent demand
Dependent demand (using MRP)
MRP logic
MRP explosion calculus
MRP basics
Outputs
production & purchase orders
action messages
Inputes
Inventory status data
Planning parameters
Master schedule (MPS)
Bill of Materials
The MRP algorithm
Lotsizing
Dynamic lot sizing
Lot-for-lot
Based on the EOQ
Silver-Meal heuristic
Wagner-Whitin method
Buffering
with safety stock
with Safety Lead Time
MRP shortcomings
ignores uncertainty
not capacity constraints
static system
Lead times are assumed fixed
Quality problems
Data integrity
Order pegging
MRP-I, MRP-II, ERP