| Recalculation of cycle time when changing man occupation or machine occupation |  |
| If you want to change the number of resources on an operation, you can do this by changing the value of the Man Occupation for Production field, or the Machine Occupation field in the Routing Operations (tirou1102m000) session, or the Production Planning (tisfc0110m000) session. If you want to avoid that the changed man occupation or machine occupation results in changed production costs, you must click Yes if ERP LN asks the question whether to recalculate the cycle time. If you do so, ERP LN calculates the following: Changed machine occupation
    New Cycle Time =
    (Old machine occupation / New machine occupation) * Old Cycle Time
    New Man Occupation =
    (Old Man Occupation * Old Cycle Time) / New Cycle Time
Example
Quantity | 10
Cycle time | 30 minutes
Setup | 60 minutes
Man occupation | 4
Machine occupation | 2
Current man hours | 20 hours
Current machine hours | 12 hours
Change machine occupation from 2 to 3. Result of recalculation New cycle time: (2/3) * 30 = 20 minutes New man occupation: (4*30)/20 = 6 men Automatically updated Resulting Man hours : 10 * 20 * 6 / 60 = 20 hours Resulting Machine hours : (3 * 60) / 60 + (10 * 20 * 3)/60 = 3 + 10 = 13 hours (the added one hour is the extra hour of setup for the third machine) Changed man occupation
    New Cycle Time =
    (Old man occupation / New man occupation) * Old Cycle Time
    New Machine Occupation =
    (Old Machine Occupation * Old Cycle Time) / New Cycle Time
Example
Quantity | 10
Cycle time | 30 minutes
Setup | 60 minutes
Man occupation | 1
Machine occupation | 1
Current man hours | 5 hours
Current machine hours | 6 hours
Change man occupation from 1 to 2. Result of recalculation New cycle time: (1/2) * 30 = 15 minutes New machine occupation: (1*30)/15 = 2 machines Automatically updated Resulting Man hours : 10 * 15 * 2 / 60 = 5 hours Resulting Machine hours : (2 * 60) / 60 + (10 * 15 * 2)/60 = 2 + 5 = 7 hours (the added one hour is the extra hour of setup for the second machine) |