WO with out Forecast / Sales order

If I create a WO for an assembly with out a sales order/ forecast then what MRP ‘ll suggest for the sub-assemblies & buy items used for that assembly.

If you don’t firm the WO then

If you don’t firm the WO then system ‘ll suggest to cancel the WO, and system ‘ll not suggest any planned orders for the SA/ Purchased items. If you firm the WO then system ‘ ‘ll suggest planned orders for the SA/ Purchased items.