Difference between Production BOM & Item BOM

bteredesai

Hi,

Can anyone explain the difference between the Production BOM & Item BOM?

Regards,

Bhushan Teredesai

johnson_alonso

Hi,

here is my opinion and answers from help of navision :
A bill of materials can consist of a very large number of components, which can be resources or items. Items can themselves be bills of materials.

Production bills of material can consist of several levels, and you can use a maximum of 50 BOM levels. One production BOM corresponds to one level. The use of other item production BOMs defines the lower levels. The production BOMs are assigned to the item in the Production BOM No. field on the Manufacturing tab of the item card.


Basically, sales and distribution only need item BOM meanwhile manufacturing needs production BOM. you use consumption journal to post material in the production BOM and consumed in the shop floor and use BOM journal and item journal for item BOM.


rgds,
Johnson Alonso

"fight fire with fire"

ara3n

If you use item BOM, you can't have WIP (work in progress Account). Basically when you post the BOM Journal components are used instatenously and finished good is created. You can't have components that are serialized. Since on BOM journal, there is no place to put the serial no, or lot number.


Production BOM has a lot of features, and has WIP and it's a complete manufacturing solution.

johnson_alonso

ara3n wrote:

Production BOM has a lot of features, and has WIP and it's a complete manufacturing solution

do you mean the WIP of production BOM could be seen in the item ledger entries ? or is there another feature in navision represents WIP of item ?

My other opinion about production BOM is it has a calculation to determine qty of item needed. Engineering change order is also available in production BOM, e.g. if you want to change a certain item in a production BOM without delete old production BOM, you can use version feature.


rgds,
Johnson Alonso

"message in blood"

kine

And of course, if you use Item BOM, the costs are not distributed through the assembly process. It is same as if you do negative and positive adjustment. But if you use Production BOM and you use the production order to create the product, you can calculate the cost of the product based on cost of the material etc...

johnson_alonso

As far as I know there are also weakness in both of BOMs. you can't use phantom production BOM in the item BOM and use resource that available in item BOM in the production BOM.
as about application, either production BOM and item BOM can't fully be applied in the chemical industries, brewery industries, petro industries except make some customisations or create add on


rgds,
Johnson Alonso

"the Lord is my Shepherd"

SV

Hi,

Production BoM is used in Manufacturing Module and it is essential for the definition of the Finished Goods Item Card. The Item BoM can be used without Manufacturing.

E.G. of use of Item BoM - In case of a trading Organization who deals in say Home Theatre or Computer. The various components may be assembled and sold. In case the organization has to place a purchase order against a demand, you can select the Finished Good Item in the Purchase Order and say Explode BoM. This will give you the break up of the components. You can then place the order for the individual components.

Hope this helps you understand the concept better.

SV