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 Labor Resources for Production (FTE) 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 LN asks the question whether to recalculate the cycle time. If you do so, 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)