Revaluing "In Progress" WIP

Hello All,

I was wondering if there is a possibility to revalue "In Progress" work orders. This situations arises from the fact of changed standard costs for the new year. I would like to revalue my "In Progress" work orders using the new standard costs and if any variances occur, I want to post it to my G/L. I tried to do WIP posting but it did not do anything. It only does the variance when I close the work order and then it posts the variances from the changed standards. 

Is there a possibility of doing the same for "In Progress" work orders? 

Thank you,

Sharat Prakash