When you set this indicator, the system generates a planning delivery schedule each time you receive a forecast delivery schedule (for example, by EDI) and save it in the scheduling agreement. It does this immediately before checking changes in cumulative quantities against tolerance levels.

When the system generates the planning delivery schedule, it issues message V4151 to inform you. If you do not want this variable message, such as in the case of incoming EDI, simply switch it off in Customizing for Sales.