Stock Status and G/L discrepency

Hi,

We are facing issues with huge discrepancies in  Stock Status and G/L . Following is the process followed:

• At monthend Stock status report is taken for Finished goods FG and Raw material RM (based on item category defined). Basically we get item quantity from F41021 and standard cost from F4105.
• WO variance is accumulated for a month (actual/completed)
• G/L trail balance is noted at month end corresponding to FG, Raw material and WO variance account and discrepancies with G/L are posted to a variance account.

Please let us know if we can compare stock status value (FG/RM) and G/L balance (FG/RM) to find discrepancies. Is the approach correct. Is there a way to find why G/L trial balance is not reconciling with stock status(say for FG/RM)