Modifying Work Orders

Every work order has a BOM and a routing code, which determine the order’s product structure and routing. When a routing or BOM code is blank, it defaults to the item number value. You can specify these for each daily scheduled requirement. Modify these codes as needed in Work Order Maintenance (16.1) and then re-explode the order.

Re-explode Planned, Firm Planned, or Batch orders as needed by running MRP or by changing the work order status to Exploded, Allocated, or Released.

Often you must modify the bill of a rework order by adding components. Sometimes, as well, you must modify the bill of a regular work order. For example, there may be an engineering change order needing immediate implementation for all work-in-process, including orders that have been exploded, allocated, or released.

How you make a replace an existing component with a new one depends on the work order status.

• If an order has been released, you can issue the new component and return the old one. This results in an unfavorable material usage variance for the new component and a favorable usage variance for the old one. Use Work Order Bill Maintenance (16.13.1) to add the new component to the work order before issuing it.

• If an order is allocated or exploded, use Work Order Bill Maintenance to add the new component, updating the quantity required and quantity allocated, and delete the old one.

After modifying a work order bill, you should not change the status back to Firm Planned, since that causes the standard bill to be re-exploded.

Use Work Order Routing Maintenance (16.13.13) to add, delete, or change the routing of a work order that is exploded, allocated, or released.

In general, the start and stop dates for work order operations are not frozen. The system automatically reschedules the operations from the due date in any of the following situations:

• A work order is processed in Work Order Maintenance (16.1) and the initial status is Batch, Planned, or Firm Planned.

• A work order is processed using Work Order Maintenance and the final status is Firm Planned.

Note: If you are using the Advanced Repetitive module, you cannot add a routing operation to a cumulative order using Work Order Routing Maintenance. Instead, you must change the routing and roll up the cost again. See Advanced Repetitive.