mrp_operation: Workorder 's costing should be based on working hours instead of number of hours.

[Antoine(OpenERP)]

This bug is present in 6.1 and trunk:
1. Create a new DB with demom data and install mrp_operation (or take a db on runbot)
2. Go into Manufacturing > Work Orders
3. Select a work order from "Assembly Workshop" and launch it
4. close it something like 10 sec after.
5. go into your analytic accounting and open the analytic account "Costing Account For Hours of Assembly." which is the account for the hours for the Work Center of the Work Order.
6. In this account, I should have analytic entries (at least one) with the amount being : time spent on my work order * cost per hour. there's a bug here because the computation is total time defined on the work center * cost per hour. This is wrong because the "realized" time to finish your Work Order is (in 90% of the case) different than the theory time you've specified on your work center

[Amit Parik (amit-parik)]

Hello Antonie.

I tried your same scenario at my end, and I got a correct result.

Analytic costing is calculated like Number of hours * Cost per hours (which is 3.61*0.10 = 0.36) which is correct (as I got).

I have prepare a video for this and attached with this bug report, So would you please check it and notify us where you faced the problem.

Or may I missed something.

Thanks and waiting for your reply!

[Antoine(OpenERP) (ahu-openerp)]

Hello Amit,

Thanks for the answer, but I think your video is showing how the computation is base on the "theoretical" side. When you define work center, you give the time taken to finish 1 cycle. This is what I call a "theoretical" value. You put it because you think it's the time it will take to finish your work order.

But Imagine this: Let's say I'm creating some elements like custom chairs. Every chair uses the same BoM and the same routing, and so, the work orders being created by the manufacturing orders are all the same. BUT, we could consider that the time taken to build and customize chairs is different for different manufacturing order (and the work orders in this manufacturing order). That's also why you have the ability to start and stop your Work Order.

Now let's say you define 1 hours for a work center, but that the work order took you 40 min to be finished. You don't want the amount for 1hour in your accounting but 2/3 of an hour. That's what I mean. The time used for calculating the cost in the analytic line should be based on the attribute "Working Hours" of your Work Order form, not based on "Number of Hours".

[Amit Parik (amit-parik)]

Hello Antonie.

Thanks for your good explanation on this.

I also agree with you, It should be consider "Working time/hours" instead of "Number of hours".

Thanks!

[Jignesh Rathod(OpenERP) (jir-openerp)]

Hello Antoine ,

Thanks for reporting.

This issue has been fixed following branch and rev no , rev id.

lp:~openerp-dev/openobject-addons/trunk-bug-1021788-jir

Rev No : 7009
Rev ID : 7009 jir@jir-desktop-20120710085303-roq2ngy21rxt1gy4

Thank you!