Work in Process Product Cost Adjustment, getting Inventory write-off transactions

We are using Standard Costing for finished goods (FG) and Average Costing for raw materials (RM).

The manufacturing work order is generating Work in Process Product Cost Adjustment and Event Inventory Write-off transactions.

In Reviewing the Cost Accounting distributions, variances should be posted if there is a difference between the input cost and the output cost.

However, instead of variance transactions, we are seeing Work in Process Product Cost Adjustment transactions being generated.

Regards

Ravi