Input to MRP
- 1. Branch : Mechanical 6-D-1 Prepared by:Dangar Shivji S.(1501231190016 Submitted to: Prof. Nilesh Gupta Computer Aided DesignComputer Aided Design (2161903)(2161903) Input To MRP
- 2. MRPMRP Material requirements planning (MRP): Computer-based information system that translates master schedule requirements for end items into time-phased requirements for subassemblies, components, and raw materials.
- 3. Overview of MRPOverview of MRP MRP Inputs MRP Processing MRP Outputs Master schedule Bill of materials Inventory records MRP computer programs Changes Order releases Planned-order schedules Exception reports Planning reports Performance- control reports Inventory transaction Primary reports Secondary reports
- 4. Master Production Schedule (MPS) – States which end items are to be produced, when they are needed, and in what quantities Bill of Materials (BOM) – a listing of all of the raw materials, parts, and sub-assemblies needed to produce one unit of a product Inventory Records – includes information on the status of an item during the planning horizon, eg. quantity, supplier, order lead time, lot size MRP InputsMRP Inputs
- 5. 14-5 MRP ProcessingMRP Processing Gross requirements Schedule receipts Projected on hand Net requirements Planned-order receipts Planned-order releases
- 6. 14-6 MPR Processing Gross requirements ◦ Total expected demand Scheduled receipts ◦ Open orders scheduled to arrive Planned on hand ◦ Expected inventory on hand at the beginning of each time period
- 7. MPR Processing Net requirements ◦ Actual amount needed in each time period Planned-order receipts ◦ Quantity expected to received at the beginning of the period ◦ Offset by lead time Planned-order releases ◦ Planned amount to order in each time period
- 8. 14-8 Updating the SystemUpdating the System Regenerative system ◦ Updates MRP records periodically Net-change system ◦ Updates MPR records continuously
- 9. 14-9 MRP Primary ReportsMRP Primary Reports Planned orders - schedule indicating the amount and timing of future orders. Order releases - Authorization for the execution of planned orders. Changes - revisions of due dates or order quantities, or cancellations of orders.
- 10. 14- 10 Requirements of MRPRequirements of MRP Computer and necessary software Accurate and up-to-date ◦ Master schedules ◦ Bills of materials ◦ Inventory records Integrity of data
- 11. 14- 11 MRP in ServicesMRP in Services Service applications such as: ◦ Professional services ◦ Postal services ◦ Retail ◦ Banking ◦ Healthcare ◦ Higher education ◦ Engineering ◦ Logistical services ◦ Real estate
- 12. Advantages of MRPAdvantages of MRP Company Advantages Individual Advantages Minimize Inventory Accurate Information Greater Responsiveness to Market Future Capacity Planning Production Planners/Managers Plant Foremen Customer Service Representative Purchasing Manager Inventory Manager
- 13. Reliance on Information Increased Material Costs Hazard of Production Slowdown or Shutdown Hazard of Stock Out Doesn’t account for Plant & Distribution Capacity Implementation Difficulties Disadvantages of MRPDisadvantages of MRP
Editor's Notes
- #13: Advantages: Inv – carrying costs – insurance, obsolete, theft Material requirements – correct time and material can be allocated appropriately since known Production Planner - balance work loads across departments and make decisions about scheduling work plant foremen - for issuing work orders and maintaining production schedules Customer Service Representative - supply customers with projected delivery dates
- #14: Disadvantages: Increased Material Costs – transportation costs, unit costs Reliance – missing parts, excessive order, delays, missed delivery date – must have at least accurate MPS with good lead time estimates, current inv records, Implementation Difficulties – time, costs, resistance