How capacity requirement calculated in RCCP in SOP

Hi,

I am executing RCCP (Rough cut capacity planning in SOP)  for a material through MC93... I am in the below situation as shown in the below screen shot... in the below screen shot if we consider April 2014 month I understood how available capacity 34819 (MIN) is calculated but not getting how capacity reqmt 397 (MIN) is calculated... can anybody guide me on this how capacity reqmt is calculated....

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Thanks

Kumar