Planned independent requirements are planned and organized in Demand Management. A planned independent requirement contains one planned quantity and one date or a number of planned independent requirement schedule lines. That is, one planned quantity split over time according to dates.
For generic article with segmentation, you can maintain separate planned independent requirements for a combination of variant of a generic article, requirement segment, plant, requirement type, version, requirements plan number, and external requirements plan ID.
For more information about PIRs in the standard ERP system, see Planned Independent Requirements (PIRs).