Hi Ajay M:
Thanks for your reply , I think that I did not describe my question clearly .OKZ3 controls the production order whether or not have plan cost .but it doesn't control when the production order reevaluates the plan cost .
my issue is I made a mistake that I maintained the price of cost center in Kp26 . I generated a production order after I correct the price in kp26. but when the production order GR the price of stock is still wrong . so I want to know when the production order reevaluates the plan cost .