You may observe a difference / discrepancy between the Inventory Valuation report and Inventory Control Account.

Please refer to the following articles that all form part of the total solution:

Article 1:

Difference-discrepancy between inventory valuation report and inventory control account

Article 2:

Full Copy Company Procedure

Article 3:

How to account for overhead costs on Manufacturing Processes

Article 4:

Refresh Views Routine - Company Downgrading and Upgrading Procedure

Article 5: 

Control Account Reconciliation Utility 1 

Article 6:

Control Account Reconciliation Utility 2