Please enable JavaScript.
Coggle requires JavaScript to display documents.
MRP - Coggle Diagram
MRP
Shortcomings
Ignores uncertainty
Forecasts
Production Lead Times
Capacity constraints (ZIO)
Back Shifting
Over-capacity
Under-capacity
Nervousness
Lead times are assumed fixed
APS
Quality
Data integrety
Scanning/RFID
Cycle counting
Order pegging
Lotsizing
Lot for Lot
EOQ + ZIO
Silver Meal
Least-unit-cost
Brute Force
Mathematical Programming Solver
Wagner-Whitin
Basics
(in)dependent demand
Inputs
MPS
Inventory Data
Initial Stock Available
Physical
Coming
Correct stock figures
Issues
Maintainence and Correct figures
cut
Quality status
BOM
Planning parameters
Lead Time
Lot size
Safety Stock/Time
Cumulative lead time
Outputs
When and how much to produce and order
Action Messages
(De)-expedite
Orders to cancel
Adjust quantity
Algorithm
1: Gross requirements
2: New receipt => lot size & planned order release
Timing
Lead time offsetting
Hard & Soft
Level X => BOM explosion => Level X+1
Buffering
Safety Stock
Safety Lead Time
Scrap Allowance
MRP 1, MRP 2, ERP