Scheduling - Min. queue time & work center / reduction

Hello,
I have a small issue with scheduling of production order.
I have maintained in a work center with Std. queue time = 15 days and Min. queue time = 7 days.
Means less then 7 days it should be not reduced and by enough time it should be calculated with 15 days.
I know the forward scheduling production takes 20 days ( 5 days for first operation plus 15 days Std. queue time for second operation)
By backwards I schedule the finish date which is less then 20 days in the future.
I would expect system would take 7 days (Min. queue time) instead of 15 days with using reduction strategy.
But system throws the message "Start date is in the past: today scheduling" and increases the finish date, with queue time = 15 day, instead to take
7 days!
I dont see system takes Min. queue time in account. Please help to find the error. Thansk!

Hi
Yes .Reduction strategy is only for floats to carry out detail scheduling
Reduction in the float before and after production in the order, expressed as a
percentage of the original float.
For example  :
The original float before and after production was 10days in both cases. You
have entered level 2 as the maximum reduction level. The reduction of the float
is in the first level 40 and in the second level 60.
This means that in the first level the float is reduced by 40% of the
original value, that is 6 days. In the second level the float is reduced by 60% of
the original value, that is to 4 days
Regards
JH

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