Open Work Order Maintenance

Open W.O. are produced either from a manual release of a firm W.O. (Release button), or from an automatic release (Scheduling Menu, Automatic Work Order Release option).

They appear in the Open W.O. Maintenance page (Control menu, Open Work orders option).

None of the fields are modifiable.

For a W.O. involved with a project, the project number is shown beside the order number.

Buttons

This page has the following buttons:

Component Issue	Shows the issue of components page for this W.O.
Receipt	Allows direct access to the receipt inventory page for a W.O. if there is a sufficient quantity available.
WO Closing	Calls the W.O. closing function.
Inv. Trans.	Shows the inventory transactions concerning the W.O. The Inventory transaction by W.O. window summarizes the part release transactions (and also the receipt inventory transactions) that concern the W.O.
WIP Trans	Shows the list of production transactions that were made on the W.O.
Operations	Shows the maintenance page of the operations in process.

Costs	Shows the costs page of a W.O. in which is summarized the costs so far.
Master Sch.			Posts the Item Master Schedule for the item.
Work Loads		This button shows the Work Load Graph window for the Work Order. This graph display the work load profile for the operation selected in the list calculated by the Infinite Scheduling and Work Load Calculation function.
Gantt			This button displays the Gantt chart for the work order, according to the backward and forward schedules. In addition, the schedule according to the scheduling release dates is displayed in the same figure. When clicking on a scheduled work order operation, a window appears which displays the sequence of each operation. This chart has to be interpreted as follows: 1. In blue is depicted the sequence planned by forward capacity schedule. 2. In red is depicted the sequence planned by backward infinite capacity schedule. 3. In green is depicted the sequence planned by the finite capacity schedule.
Graph			This button displays the work order flow chart. This chart presents the sequence of the operations and shows estimated flows (including scraps effects). On this chart, one can see the transferred quantities, the rejected quantities and the quantities on standby (in blue). The closed operations appear in red, the operations in progress, in blue and the not started operations, in green
Costs			This button displays the Work Order Cost page. If the Budget frozen data have been created, the projected costs are compared to the budgeted costs.
Documents

The Lead Time is the item lead time specified in the Item Reorder Policy page.

The Wk hours is equal to the sum of the machine times (including the set-up times).

The throughput time is equal to the work hours plus the sum of the move times.

The fields on the right hand side are updated by the production transactions function.

The In proc. field contains the quantity released less the finished or rejected quantities.

The Rejected field contains the sum of the quantities declared as being rejected for the operations

The Completed field contains the sum of the finished quantities of a W.O.

The In shop field contains the finished quantity minus the quantity that has been entered into inventory. It is therefore the quantity remaining in the workshop.

This page has three tabs:

• The first (Operations) presents the progress of the manufacturing operations; when an operation in the list is clicked on, it is displayed.

• The second (Components) shows the list of parts requirements; when a part is clicked on, the inventory levels is shown.

• The third (Dates) shows the scheduling dates that have been calculated by the function Scheduling and loading calculation or by the scheduling button, also the planned dates can be got from the finite capacity scheduling function.

Components Tab

This presents the component list required for the manufacture of the W.O. The columns are detailed below:

• Required: The quantity of the W.O. multiplied by the part utilization coefficient defined in the possible scrap part upper BOM structure.

• Reserved: The quantity that remains reserved (requirements - issues).

• Issued: The quantity that has been released (by the function W.O. part release).

• In process: The quantity of parts that remain in the workshop (issued - used).

• Used: The quantity of parts in the items of the W.O., which have already been entered into inventory.

• Op.: This is the routing operation number where the part must be used.

Dates Tab

This tab presents:

• The forward and backward infinite capacity schedules; the slack equal to the difference (in hours and hundredths) between the latest due date and the earliest due date on the plant calendar; the capacity ratio is equal to the relationship of Work time to throughput time.

• The dates that came from the finite capacity scheduling; the slack is equal to the difference (in hours and hundredths) between latest due date and the earliest due date on the plant calendar; the capacity ratio is equal to the relationship of Work time to cycle time determined by the schedule (the difference between the latest due date and the earliest due date).