15 Overview to Single Level Master Scheduling
This chapter contains these topics:
15.1 Objectives
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To create Distribution Requirements Plans (DRP) or Master Production Schedules (MPS)
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To understand the Net Change program
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To read and use time series displays
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To understand time fence rules
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To interpret Ending Available (EA), Available to Promise (ATP), Cumulative Available to Promise (CATP), and Forecast Consumption (FCP) calculations
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To review and process action messages
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To process purchase orders with or without blanket order check
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To consolidate messages and purchase orders
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To add a freeze code on purchase orders and work orders
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To use Rough Cut Capacity Planning (RCCP) to validate the master schedule
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To set up master planning and rough cut capacity displays
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To process work orders
15.2 About Single Level Master Scheduling
A single level master schedule is a statement of what the company expects to produce based on the tactical plan and budget constraints.
A master scheduled item is critical in its impact on lower-level components or resources, such as skilled labor, key machines, or revenues. Single level implies master scheduling at the end deliverable item level.
The master scheduling process consists of:
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Determining what you need (forecast, customer orders, and interplant demands)
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Subtracting what you have (inventory, purchase orders, and work orders)
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Calculating net requirements and when you need them
You can generate master planning for all items or for a net change generation, which includes only items that have been affected by transactions since the last generation. After you generate DRP/MPS output, you can review and respond to messages.
Master scheduling consists of the following:
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Understanding time fences and system messages
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Generating single level master schedules
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Understanding forecast consumption
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Working with master schedules
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Validating master schedules
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Setting up DRP, MPS, and RCCP
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Processing orders
15.2.1 Master Scheduling Applications
For distribution businesses, DRP provides centralized control of distribution inventories and creates a coordinated replenishment plan.
You use MPS to generate the master schedule for manufactured items. JD Edwards World systems plan replenishment for both purchased items and manufactured items in the same generation program. Processing options control how the system runs the generation.
