| # Print Production Order Planning by Priority (tisfc1410m000) Use this session to print production order planning by priority. You can select in the Print Priority field which criterion ERP LN uses to decide which orders have the highest priority. You can select one of the following criterions: Critical Ratio Earliest Due Date Priority of Prdn Order Shortest Total Rem.Prd.Tm Slack Time If you manually enter a production-order priority in the Production Orders (tisfc0501m000) session, you can express the priority in a number in the range 0-999. The default is 999. This number expresses the lowest order priority. The highest priority in ERP LN is 0 (zero). The report includes the following data: Priority Production order Operation Project Item Machine Task Work center Note If the report takes a long time to be produced, it may help to limit the range of orders (and other variables) that you select. Days Late The Days Late column is one of the columns printed in the report. The Days Late is calculated as the difference (in days) between the production order's Planned Delivery Date and the Reference Date as defined in the Print Production Order Planning by Priority (tisfc1410m000) session. Each day on which working hours are available is counted as one day late. For the first day and the last day, working hours are exactly calculated to determine the days late. Note Maximize your window, if necessary, to view the following diagrams correctly. Example Value of the Reference Date field: 26 August 1998. This is the date on which the calculation of Critical Ratio and Slack Time as priorities is based. A production order A1 consists of 4 operations:
operation | start date | end date | slack | overlap*
--- | --- | --- | --- | ---
10 | 25-Aug-98 | 2-Sep-98 | 0 | 50 %
20 | 29-Aug-98 | 15-Sep-98 | 0 | 0 %
30 | 15-Sep-98 | 10-Oct-98 | 8.0 | 0 %
40 | 18-Oct-98 | 30-Oct-98 | 0 | 0 %
*The overlap percentage is based on the transfer batch quantity. The time-frame diagram: 4 methods exist to calculate the Critical Ratio and the Slack Time, dependent on whether the Production Time Including Overlap Time check box is selected: Method 1: without overlap or slack time between operations Method 2: with overlap, without slack time Method 3: without overlap, with slack time Method 4: with overlap and slack time Critical Ratio
| Operation time |
Method | 10 | 20 | 30 | 40 | A* | B* | C* | D*
--- | --- | --- | --- | --- | --- | --- | --- | ---
- overlap -slack | 8 | 17 | 25 | 12 | 62 | 66 | 1.06 | 4
+overlap -slack | 4 | 17 | 25 | 12 | 58 | 66 | 1.14 | 8
- overlap +slack | 8 | 17 | 33 | 12 | 70 | 66 | 0.94 | -4
+ overlap +slack | 4 | 17 | 33 | 12 | 66 | 66 | 1.00 | 0
*
A | Remaining production time
B | Planned Delivery Date - Reference Date
C | Critical Ratio
D | Slack
Using Method 3: Critical ratio (CR) = 66 / 70 = 0.94 If the Critical Ratio = 1, the order is on schedule, > 1, the order is ahead of schedule < 1, the order is behind schedule. Slack Time
     Slack time =

    (Planned Delivery Date - Reference Date) - remaining production time
Using Method 3: Slack time = 66 - 70 = -4 If the Slack Time = 0, the order is on schedule > 0, the order is ahead of schedule < 0, the order is behind schedule Production Start Date and Time Planned Delivery Date Operation Start Date Operation End Date Print Priority The way that priorities are determined. For more details and examples, see the Print Production Order Planning by Priority (tisfc1410m000) session. Allowed values Print Priority Lower Boundary Priority Value If the value of the priority you selected in the Print Priority field is less than the value you enter in this field, it is not printed. Reference Date The date and time that ERP LN uses to calculate the Critical Ratio and the Slack Time.
    Critical Ratio =
    (Planned Delivery Date - Reference Date) / remaining production time
    Slack Time =
    (Planned Delivery Date - Reference Date) - remaining production time
More details are given in the Print Production Order Planning by Priority (tisfc1410m000) session Help. Related topics To determine on order dates Production Time Including Overlap Time If this check box is selected, the slack time that you have planned is included in the calculation of the order cycle time, and used in the calculations of priorities (refer to the Print Production Order Planning by Priority (tisfc1410m000) session). Production Time Including Overlap Time If this check box is selected, the overlap time is considered in the calculation of Critical Ratio. If you have selected Critical Ratio as the criterion for order priority, this can affect the order of the priorities. See the Print Production Order Planning by Priority (tisfc1410m000) session for more details. Related topics Queue time compression Previous Operation Must be Completed If this check box is selected, only the first operation that has not been reported as complete is printed. If this check box is cleared, all operations are printed. Note You cannot select or clear this check box if the Report field is Production Order. Base Selection Order on Report If this check box is selected, the details of the report are sorted in the same order as the main selection. This is usually fastest way to print the report. Selection Order The order by which the details of the report are sorted. For example, if you want to print a report for all production orders of a specific work center, you must select Work Center. ERP LN then prints the production order data by work center. Production Start Date Planned Delivery Date Operation Start Date Operation End Date Upper Boundary Priority Value If the value of the priority you selected in the Print Priority field is less than the value you enter in this field, it is not printed. Print Prints the entered selection. |