A firm planned order (FPO) is an order frozen in quantity and time.
By changing the status, all planned orders up to the planning time fence can be converted to FPOs. This is normally done manually, but can also be done automatically within a set time limit.
Although FPOs can be used on all levels in the structure, they are mainly intended for master scheduled items.
An FPO always has a status between 20 and 59.