This feature enables you to set a default reservation principle for each item model group, which means that you can have different reservation principles applied automatically for each item that is part of a production bill of material (BOM) or batch order formula. For each item model group, you can now choose whether that group should override the default reservation principle set for an order, and choose what that group's reservation principle should be (manual, estimation, scheduling, release, or start). When you create a new production or batch order, you are asked to select a reservation principle to apply to that order and all of its BOM or formula lines. With this new feature, some or all of the BOM or formula lines can instead override that default to match the reservation principle set for the relevant item model group.