You can build your own custom module for this requirement. You can proceed in these ways: You should first inherit mrp.bom and add a new field 'price_unit': fields.float('Unit Price') and redefine the onchange_product_id function define compute_price and compute_total function to calculate "line price" and "total price" Then you have to inherit mrp.production and define compute_production_cost function to update cost_price from BOM. We have created this custom module and it works perfect , in my module it takes avg purcahse price in BOM and we added an extra tab to manufactring form to compute Production Cost , in that tab you can add extra charges like electicity etc.. , that charges also added to cost by calculating per_unit charge depending on UOM. for any help you can contact  akhil.p.sivan007@gmail.com

Dear Kevin,

Thank you very much.

In fact, what I need is a module that updates the product cost price when we register a Purchase Order.

When we register a PO on core Odoo, the product price on the product table is not automatically updated. What I need is to have a module that updates this price whenever I register a purchase order. Perhaps there's a way to do it on standard Odoo functionality but I do not know how. Can you please help?

Thank you once again

Regards

Paulo Matos

Yes, the above is correct as we are using purchase_landed_costs and confirm the following with camptocamp module:

=> I understand. The point is, this is very difficult and cost a lot to achieve due to the structure of OpenERP (or odoo).

Currently, we solved that this way: * AVG price is computed with the PO landed costs when receiving the goods (picking ->done)

 * The margin in the SO line are computed using the current value (means the actual AVG price before ordering new goods to the supplier)

 * IF THE CUSTOMER INVOICE is generated AFTER deliveries, then you can have the proper margin computed in the invoice line using the product_historical_margin module). Because here, the AVG cost taken is the one after validating the incoming shipment from the supplier. So:

a) SO confirmed by customer with margin = current value

b) PO ordred to supplier

c) Goods received and AVG price updated

d) Customer invoice generated with proper margin

So my advice is here to compute commission based on invoice line instead of sales order lines.

Our next module is to create an a workflow "Waiting Landed Costs" so we will not receive the product until we have all Landed costs on the product view and sales order line. With using margin-analysis modules from camptocamp we can generate the true margin for reporting

In the previous OpenERP version, average cost could be activated. However, the calculation was incorrect in some cases pertaining to the sequence of the stock moves.

Obviously this is not standard logic where the average price is updated based on the receipt of the goods.

You could change your cost method to standard cost and develop a module that updates the standard cost that is called on PO confirm.

w