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MFG/PRO 9.0 User Guide Volume 3: Manufacturing - QAD.com

MFG/PRO 9.0 User Guide Volume 3: Manufacturing - QAD.com

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260 <strong>MFG</strong>/<strong>PRO</strong> USER GUIDE — MANUFACTURING<br />

Ï See Chapter 12,<br />

“Material<br />

Requirements<br />

Planning,” on<br />

page 239.<br />

Tip<br />

Repetitive<br />

schedules are<br />

treated like<br />

Exploded orders.<br />

When manufacturing order operations overlap, the system smoothes the<br />

scheduled start and due dates to prevent the scheduled due date for one<br />

operation from occurring later than the due date for a subsequent<br />

operation.<br />

Schedule Discrepancies<br />

MRP calculates manufacturing order release dates using a manufacturing<br />

lead time that is based on an average order quantity defined in Item<br />

Planning Maintenance (1.4.7) or Item-Site Planning Maintenance<br />

(1.4.17). If the order quantities used in CRP calculations differ from this<br />

average quantity, CRP may schedule the start date for an order’s first<br />

operation before the release date for that order.<br />

When this occurs, a message displays to alert you of the conflict. You can<br />

resolve such conflicts by adjusting the order release or due date and<br />

rerunning CRP.<br />

Note Exceptions to the normal work week in the work center and shop<br />

calendars—for example, planned overtime—may also cause schedule<br />

discrepancies in CRP.<br />

CRP and Order Statuses<br />

CRP is normally executed for Planned and Firm Planned orders. For these<br />

orders, CRP explodes the standard item routing and schedules the<br />

operations to create work center/machine load.<br />

You can also choose to include orders with other statuses. For Exploded<br />

and Allocated orders, the work order routing is scheduled. For Released<br />

orders, only open operations are rescheduled.<br />

When you run CRP, all open operations for selected work orders are<br />

rescheduled. That means that if you have manually adjusted your<br />

operation start and stop dates, they will probably be changed unless you<br />

also adjusted the work order release and due date to match.

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