Re: workorder with nested BOM's

On 9-Jul-09, at 2:26 PM, Nathan Gray wrote:
>
>> ...
>> Would also be good to flag WO's as waiting for stock (idea stolen
>> from openerp).if not all subcomponents are available.
>
> That sounds like a great idea.  ...
> It would be good to see some kind of warning about that on the work
> order list.

Done.  Some other errors and warnings are in there too, but the most  
common one is inventory shortage.

>> Waiting for stock should not block the start of a WO (one can do a
>> lot of work, even if the final screw is still missing).
>
> You can still build even if the computer says the screws aren't
> there.  Nothing more annoying than having to stop production because
> somebody miscounted 2 months ago...


In my investigations, it turns out there's a good reason to block  
production.  If there's no inventory, FIFO costing has issues.  Turns  
out the first item in an empty list is ... nothing.  Of course, this  
doesn't affect production at all, but when your example "screw" costs  
a few more dollars, this can throw off the cost of the item being  
produced by a noticeable amount, which causes accounting more work  
because they have to correct it.

In pERP, the 'final screw' is not an issue if you're using workflow,  
because that gives time for the screw to arrive before it needs to be  
used.  Without workflow, the entire build is done at once (usually  
after the work order has been physically built), so all parts need to  
be there.

I'm going to refine the stock shortage check, so that if you're not  
using workflow, it will block the WO.
Those using workflow will have a config option if they want to block  
workflow for stock shortages, but the default will be to let it go.

Nathan Gray
nathan at goarctic dot com


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