Manufacturing   Manufacturing module based on Bill of Material definition the required product is manufactured at needed quantity.   After the approval of engineering team we can take that product design into Manufacturing Unit i.e. to Manufacturing module.   Once the manufacturing is completed the particular product will be included in inventory.   Until the manufacturing process your bill of material definition will be available as document.   The stock level of the item is increased in inventory based on Quantity of production and the corresponding component items in inventory gets reduced.