We had the period split (from monthly forecast to weekly PIR) set at the 6 months. But it generated spikes in requirements around the 6th month. If we want to maintain the all the PIRs in weekly bucket within 1 year, it would require us to change the period split setting to beyond 12 months. The change would impact the MRP performance due to the data volume increase. i am wondering what the optimal period split setting should we use. What do other companies set for the period split for transfer to demand management? thanks.