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Master Production Scheduling (MPS). Production Planning and Control System. Establishes overall production, workforce, and inventory levels. Sales and Operations Planning (S&OP).
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Production Planning and Control System Establishes overall production, workforce, and inventory levels Sales and Operations Planning (S&OP) Determines when specific products will be made, when specific customers orders will be filled, and what products inventory are available to meet new demand Master Production Scheduling(MPS) Calculates the timing and quantities of material orders needed to support the master schedule MaterialRequirements Planning (MRP) Purchasing Control Production Control (PAC)
Demand Resources Strategic planning Resources Planning Sales&Operation Plan. (AggregatedProduction Plan) Forecasts Rough-cut Capacity Plan. Master ProductionScheduling (MPS) Customers Orders Detailed Capacity Requirements Plan. Material Requirements Plan Plan Execution Input /Output Control Purchasing Control Production Control PLANNING AND CONTROL SYSTEM
Master Production Scheduling (MPS) Master Production Scheduling allows the firm to: • „Break down” the aggregated plans made in the SOP into productionschedule of specific products which are ordered by customer • Serve as a plan that uses actual customer orders in addition to forecast data • Serve as a source of information by which it is possible to develop much more specific capacity and resource plans. • Serve as a method to effectively translate customer orders into effectively timed production orders for the facility. • Serve as an effective tool for planning finished goods inventory levels
Master Production Schedule A statement of what the company plans to produce in terms of individualproducts, quantities and planning periods MPS PURPOSE: • A schedule for production orders for MPS items • Drives the MRP calculation • Input to Rough-Cut Capacity Planning • Basis for making delivery promises to customers WHERE APPLICABLE ? In all manufacturing companies
Master Production Scheduling (MPS) Master Production Schedule should take into account: • customers requirements (quantities and delivery time) • capacity and time constraints (be feasible) • production efficiency factors (minimum production batch size, inventory holding level)
Master Production Scheduler Master Production Scheduling Requirements: • Demand forecasts • Customer orders • Safety stock • Orders from Final Product Warehouse Resources: • Materials • Capacity • Over time • Regular time • Subcontracting
MTO MTS A MTS X Master Production Scheduling in production environments SOP – Sales and Operations Plan FAS – Final Assembly Schedule SOP, FAS SOP, FAS SOP, MPS, DRP Final Products Final Products Final Products Modules MPS MTO V Materials Materials Materials MPS Make to Stock Make to Order Assembly to Order Master Production Scheduling depends on the production environment (MTSor MTO or ATO). MPS operates at the level that has the fewest items that need to be scheduled. The subject of planning : • MTS - specific final products • ATO – modules and components to be assembled • MTO – standard components and raw materials
Month March April Week 9 10 11 12 13 14 15 16 Product A Demand 350 350 350 350 450 450 450 450 Product B Demand 200 200 200 200 300 300 300 300 Product C Demand 200 200 200 200 100 100 100 100 Sales and Operations Plan disaggregation (family of ABC products case) Demand disaggregation in March and April A,B,C products demand decompositionin March and April Product participation in total demand:B= 26.5%, C = 26,5%, A =47%
Master Production Scheduling Product: B Lot size: 400 units On-hand: 300 units Projected available – planned inventory available at the end of the week On-hand – current inventory (initial inventory) Lot size – minimal quantity accepted MPS – Master Production Schedule
Master Production Scheduling (Make to Stock environment) Product: B Lot size: 400 On-hand: 300 Projected available - inventory available at end of the week Projected available On Hand MPS Demand forcast = + -
Customer orders entry Demandsources: individualcustomers orders, distributorsorders, final products warehauseorders Product: B Lot size: 400 On-hand: 300 Projected available – planned inventory available at end of the week Projected available On Hand Larger Forcast/Orders MPS = - +
Available to promise Available to promise allows the firm very quickly and realistically promise delivery of products to the customer without any changes in MPS Product: B Lot size: 400 On-hand: 300 Total orders to the next MPS Available to promise Week 1 MPS (1) On Hand = - + Total orders to the next MPS Available to promise Week n MPS (n) = -