Hello Eric,
You achieve your requirement using MD25, Planning calendar
1) Produced in 1st week of month
Fro this using Month( Week Days)
Counter week day - 1, week day 1(Monday), Here you can select any day of week
As per this setting system peak every month first week Monday for this material
2) produced in 3rd week of month
Fro this using Month( Week Days)
Counter week day - 3, week day 1(Monday)
As per this setting system peak every month third week of monday for this material
3) produced in 2nd and 4th week of month.
For this using Month( Week Days)
Counter week day - 2, week day 1(Monday) ,
Counter week day - 4, Week day 1( Monday),
As per this setting system peak every month 2nd and 4th week of monday for this material
Assign each planning calendar in respected material and select the lot size PK,
I hope this information helpful to you,,
Regards
Umesh Mali