This module is available only when Stock Disassembly module is enabled, please go to Tools > Program Control > Module Setting, check the checkbox Stock Disassembly.
What it is for?
Stock disassembly is to disassemble finished goods and get back to its raw material. This transaction will decrease stock quantity of finished goods and at the same time increase stock quantity of raw material items.
The raw material cost then will be fraction and calculated from Finish Goods cost.