You specify two accounts in WIP A/C class in front of Material and Resource TAB. One is Valuation and another is Variance A/C.
When Inventory issues the Material, transactions that happen are as follows:
INV valuation A/C credit
WIP Material Valuation A/C debit
And when you close the WO
Transactions are :
WIP Material Valuation A/C credit
WIP Material Variance A/C debit
WO Closing fires these transactions so unless and until the WO is closed these transactions are not fired.
And costing cycle still remains uncompleted and while closing INV period it shows the number of WO of whose status is not closed as pending.
Note that: These transactions will hit the GL only when you run the GL transfer from Inventory for the month for which these transactions are for.
Also it depends upon scenario to scenario.
Example for Two different accounts at WIP Accounting:
So when a requisition of material comes from Maintenance, the material is transferred from Main Store to Equipment side sub inventory. [Note that this material is still not consumed, but, lying at different store. So tracking of this is necessary]. This transaction in system is captured at issuing of material from inventory to Work Order.
And Variance Account becomes a P&L Account.
Any doubts still?