[PATCH] mrp.bom: include product_qty of child BoMs in factor

[Adam James]

Patch is against trunk.

the _bom_explode function in addons/mrp/mrp.py doesn't take into account the quantity required of the parent BoM when computing required parts. If a sub-BoM has a quantity of 4 then all the parts below must be multiplied by 4. The attached patch fixes this error.

[Vinay Rana (OpenERP) (vra-openerp)]

hello,

If a sub-BoM has a quantity of 4 then all the parts below must be multiplied by 4.

It is working if print the Product Cost Structure from product object which has BOM.It will call a wizard by taking Number of product to produce as a input and will be printed the product cost structure as multiplied of Number of product to produce.

Hope this will help you.

Thanks.

[Chris Halls (halls)]

I found a bug in the patch - child BoM quantities will be multiplied by the square of the quantity, instead of the quantity in the BoM. I will attach a new version of the patch.

[Chris Halls (halls)]

In reply to vra:
> If a sub-BoM has a quantity of 4 then all the parts below must be multiplied by 4.

This is a workaround for the problem, which I still consider to be a bug. If you define, say, a BoM for a car wheel, it does not make sense to say that a wheel needs 4 tyres! This does not make sense to the users and is a real problem if you try to do costings of child BoMs.

[Ujjvala Collins (uco-openerp)]

Hello,

I have tested this problem with the following example.
Bill of Materials:
----------------------
Product A : 1.0 PCE
  |_ Product B : 1.0 PCE
  |_ Product C : 1.0 PCE
  |_ Product D : 1.0 PCE
        |_ Product 1 : 2.0 PCE
        |_ Product 2 : 2.0 PCE

Make a Production Order for Product A with quantity 4.0 and confirm it.
You will get the following in Products to Consume.
Product A : 4.0 PCE
  |_ Product B : 4.0 PCE
  |_ Product C : 4.0 PCE
  |_ Product 1 : 8.0 PCE
  |_ Product 2 : 8.0 PCE

When a component (e.g. Product D) has sub-components (e.g. Product 1 & Product 2), then while making a production order for the main product (e.g. Product A), there is always a consideration of sub-components and their quantities and not the component.

You can refer to the following link:
http://doc.openerp.com/book/5/5_15_Manufacturing/5_15_Manufacturing_production.html#bills-of-materials

I request to check again with the latest trunk-addons.

Hope this will be helpful.

Thanks.

[Vinay Rana (OpenERP) (vra-openerp)]

Hello,

With reference of comment #6, I am closing this issue.

Thanks.