Field help (ITMCOD) 

Select this check box if the work order suggestions / purchase order suggestions (WOS / POS) calculation is only to be performed on the items selected according to the MRP and MPS parameters (MRP, MPS and MRP + MPS products).
Material in work order suggestions (MWS) inherited from a different requirement calculation (an MPS calculation towards an MRP calculation and vice versa) and triggered by a WOS on parent products excluded from the current items, are excluded from the current calculations.

This option is recommended if there is an overlap between product groups. For example, MRP on MRP products and MPS on MRP + MPS products, or on identical groups (MRP and MPS on MRP + MPS products). It also reduces the calculation volume (MRP on MRP products and MPS on MPS products).

Leave this check box clear to ensure ascending compatibility between previous versions of the requirement calculations. The WOS / POS suggestions calculation is carried out on all products at the site. Only the WOS / MWS results relating to the selected product group are then specified in the ORDERS - WIP table. All MWS are considered as requirements for the current calculation, regardless of their origin (either MRP or MPS).