c2c-oerpscenario team mailing list archive

["Olivier Dony \(OpenERP\)" <845259@xxxxxxxxxxxxxxxxxx>]

For the record, here's the answer I suggested on the converted question:

Short answer:
This is currently a limitation of OpenERP's average cost, done on purpose for manufactured goods. Average cost updates are supposed to be done manually, but OpenERP can help you with the data and maths.

Longer answer:
As Graeme commented, in most cases the real cost of such manufactured goods is much more complicated than a simple sum of the inputs, even including service expenses in it.
Updates of the average costs are done only for purchased goods, where the actual cost can be inferred from the invoice.
For manufacturing, instead of making a bold assumption on the production costs being a direct sum, OpenERP currently leaves the average cost untouched. One usual way to work it out is to periodically compute the average global costs for manufacturing, taking into account all the indirect costs, and then update the cost manually.
OpenERP can assist you in this process in several ways: the `product_extended` module includes a wizard to compute the direct sum of the BOM entries for your product, giving a "guesstimate". Also, if you assign analytical accounts to your workcenters, these account will contain entries reflecting the actual time/cycle production costs, which is another source of data for your periodical re-evaluation of the manufacturing costs.

If you have suggestions/contributions to improve these tools in a
generic way, they would be most welcome of course!

Thanks!

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https://bugs.launchpad.net/bugs/845259

Title:
  Average cost does not automatically update for manufactured items

Status in OpenERP Addons (modules):
  Invalid

Bug description:
  Based on 6.0.2 Anglo-Saxon

  Manufactured product with costing method = average price. Made a
  product - updated SOH but cost not updated.

  Also, if a manufactured product is a combination of products and
  services (ie the labour involved in manufacturing) I can see the task
  being created but how is that time captured in the manufacturing order
  (and should be included in costs updated)

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