We first started using the worksheets to correct the COGs values we were seeing upon item fulfillments. We do not have the Netsuite "Assembly" module, yet, we do have "assemblies"; so, our COGs has been off for quite some time, causing us to need to journal out the differences on a monthly basis. Using a steady stream of Worksheet adjustments has correspondingly, reduced the quantity and total dollar amount of those COGs offset journals we've had to do.
But, we're not out of the woods yet with COGs; and, it'll be a sustained process. Every time we issue a PO (and that PO is received), we'll need to do an inventory worksheet adjustment.