Download - Mrp 2 Manufact Resou Plannin
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Manufacturing Resource Planning (MRP 2)
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Historical Perspective
Mrp 1 – material requirements
planning
MRP II – ManufacturingResource Planning
ERP- Enterprise Resource Planning
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MRP 2
Definition:
It is the basis of Enterprise Resource Planning (ERP).MRP 2 and ERP are connected with manufacturing aspects of the expanded model.
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MRP II -- Manufacturing Resource Planning
“A method for the effective planning of all resources of a manufacturing company” (APICS def.)
Financial accounting incorporated Sales Operations Planning Simulate capacity requirements of different possible
Master Production Schedules
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ERP Sales
Worldwide sales of top 10 vendors1995 $2.8 B1996 $4.2 B1997 $5.8 B $3.2 B SAP
Fortune survey: 44% reported spending at least 4 times as much on implementation as on software
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3 Reasons for ERP
1. Legacy systems outdated and need replacing anyway
2. Desire for greater communication between locations
3. Reconfigure business to take advantage of current and future communications and computing breakthroughs
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1605 Snow Shovel
1605 Snow Shovel
048Scoop-shaftconnector
13122 Top Handle Assy314 scoop assembly
118 Shaft (wood)
062 Nail (4)
14127 Rivet (4)
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314 scoop assembly
314 scoop assembly
14127 Rivet (6)019 Blade (steel)
2142 Scoop (aluminum)
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13122 Top Handle Assembly
1118Top handle
Coupling (steel)
11495 WeldedTop handle bracket
Assembly
13122 Top Handle Assembly
457 Top handle(wood)
129 Top HandleBracket (steel)
082 Nail (2)
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BOM Explosion
Process of translating net requirements into components part requirementsTake into account existing inventoriesConsider also scheduled receipts
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BOM Explosion Example
Need to make 100 shovelsWe are responsible for handle
assemblies.
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Timing of Production
This tells us how many of each we needDoesn’t tell when to startStart as soon as possible?Dependent events (oh no, not that!)Front schedule Cutting approachBack schedule
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Other considerations
Safety stock if uncertainty in demand or supply quantity Don’t let available go down to 0
Safety LT if uncertainty in arrival time of supplyPlace order earlier than necessary
Order quantitiesEOQ, Lot-For-Lot, Periodic Order quantity,
others
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Assumptions
All requirements must be available at start of period
All future requirements must be met, and can’t be backordered
System operated on periodic basis (e.g. weekly)
Requirements properly offset for LTsParts used uniformly through a period
Use average inventory levels for holding cost
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Simulation Experiments
What is best under real-world conditions?Multiple levels to be concerned aboutReal-time changes
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ReferencesRussell, Roberta S., and Bernard W. Taylor III. Operations Management.
3rd Edition: Prentice Hall, 2000
Grubbstrom, Robert W. Material Requirements Planning and Manufacturing Resource Planning. 03/12/2002. http://www.itbp.com/opsmanagement/iebm/material_requirements.htm.
Vormittag Associates, Inc. System 2000 MRP. 03/12/2002. http://www.vaihome.com/s2000mrp.htm.
Inventory Solutions. What is MRP?. 03/12/2002. http://www.inventorysolutions.org/def_mrp.htm.
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