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Re: Best model for selling unique products (used machines)

by
Quartile Limited, Yoshi Tashiro
- 24/08/2020 14:58:21
We extended the product template model for a similar requirement (reuse business handling a lot of home electronic products).  We did not go for the option of using stock.production.lot for the same reasons as Peter raises.  We haven't had a major issue pertaining to this decision.


-- 
Yoshi Tashiro



On Mon, Aug 24, 2020 at 11:12 PM Frederik Kramer <frederik.kramer@initos.com> wrote:
Hi Bettina, 

thanks for this insight. Obviously my PM heart agrees. By doing such
project we should also ask the rather business oriented questions on 
what may happen next in the mind of the customer and also give a
helping hand and ideas on conceiving this future.

Nevertheless if you boil it down to engineering practise it is often
relatively cumbersome to start out with a "simple" solution, because
simple in case of Odoo (from a business perspective) means "using" a
standard from the OCA (which is usually well elaborated on overall and
very generic needs and integrated with lots of other modules) or doing
exactly what you need (now or for the near future).

If you one uses the OCA standard this is simple as it doesn't require
you to reinvent something and is also desireable from the
standardization point of view, but it comes with a certain payload
(maintaining the code and all its dependencies also for the 80% of the
functionality included you never or seldomly need). On the other just
adding what you need is easy as it doesn't involve too much development
(and therefore budget discussion with the customer) but often evolves
into something that becomes more and more like the original OCA
standard after N interations (obviously not desireable as this is a
waste of resources as well).

One of the problems that developers often have is that the OCA / Odoo
standard in the first place looks like something that you need to have
a PhD for to understand in its entirety.

As far as i understood Peter he is just questioning (with regard to
CRM) if it would really be desireable to use stock.production.lot and
make that work with the typical sale.order object or rather use
product.product and extend it (obviously loosing complexity trough
depence but also information such as traceability in stock moves).

This is not only to be answered with the concrete business domain at
hand but also with the opinion of colleagues around the globe that
faced a similar problem in the past.

I personally always tend to go for the "standard" OCA solution but for
instance in terms of "ease of use" for the end user that is rather
seldomly a very good shot in the first place

Thank you very much for your opinion on the matter

Best Frederik
 


Am Montag, den 24.08.2020, 13:26 +0000 schrieb Bettina Pfeifer
dygytally.de:


> Hi Peter, 


> 


> sometimes it helps to imagine what you (your future odoo client) want


> to know after one, two, three ... years of sales. What would you like


> to know about all your sales, the products you sold. Which ones made


> trouble after sales, which ones made your odoo client happy, which


> ones led to more trades, which ones where hard to get and easy to


> sell or vice versa. Which ones need a lot of warehouse space, which


> ones need special care. How do you want to report on the past. What


> decisions should be made for the future. 


> 


> Maybe this helps a bit to decide on your current question. Sometimes


> these questions make the odoo client reveal their true needs. 


> 


> And if you are able to generate the "list" you mention, that might be


> good starting point. 


> 


> And the original serial numbers of the used machines themselves


> should be used, as long as they have one. Otherwise you could create


> an own serial number.   


> 


> In general, why not start as easy as possible, until other


> requirements arise while using odoo. 


> 


> Regards, Bettina


> 


> 


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> Am 24.08.20 um 13:17 schrieb Peter Hahn:


> > Hi David,


> > 


> > thanks for your suggestion. I didn’t knew the module.


> > 


> > I’m still not really convinced using serial numbers is the right


> > thing


> > here in general.


> > Sure it would be for smart phones and stuff like this, but I would


> > really like to hear opinions about what problems may arise in case


> > of


> > just using `product.product`.


> > 


> > At first glance this seams to be way more simple. Especially I


> > think


> > it’s intuitive for the users because in their business mindset they


> > don’t think of _machines_ and _instances of machines_ but just a


> > specific _machine_ from their list.


> > 


> > Our use case to me looks more like being the base machine a


> > `product.template` and the unique machine a `product.product`.


> > 


> > However I wouldn’t use all the `product.attribute` machinery  for


> > this,


> > of course.


> > 


> > I hope to hear more opinions from the list about this.


> > 


> > Thanks. Regards, Peter


> > 


> > 


> > 


> > Am 21.08.20 um 17:02 schrieb David Beal:


> > 


> > > Hi Peter,


> > 


> > > Consider these modules


> > 


> > > 


> > https://github.com/OCA/sale-workflow/tree/12.0/sale_order_lot_selection


> > [1]  


> > https://github.com/OCA/sale-workflow/tree/12.0/sale_order_lot_generator


> > [2]


> > 


> > > and in pending migration


> > 


> > > https://github.com/OCA/sale-workflow/pull/1144 [3]


> > 


> > > Note that sale_order_lot_selection in v12 and v13 are different,


> > consider the v12 one


> > 


> > > Best regards


> > 


> > > 


> > 


> > > David BEAL - akretion.com [4]  Consultant


> > 


> > > Odoo Intégration / Développement


> > 


> > > Le ven. 21 août 2020 à 15:36, Peter Hahn < peter.hahn@initos.com


> > [5] > a écrit :


> > 


> > > Hello,


> > 


> > > I have a hard time to decide which Odoo model to use for selling


> > unique


> > 


> > > products.


> > 


> > > The products are used machines. So in general one could think of


> > a


> > 


> > > generic product with manufacturer and model and a certain


> > instance of it.


> > 


> > > But since these are used items, they come with a lot of


> > customizations


> > 


> > > and other instance specific attributes like operation hours etc.


> > 


> > > So it’s more like the product == instance.


> > 


> > > We thought about using `product.product` for the brand/model and


> > 


> > > `stock.production.lot` for the instance, but after some research


> > in the


> > 


> > > odoo v12 code I'm not sure if this is really the best option.


> > 


> > > To me it looks like `stock.production.lot` is more about


> > tractability of


> > 


> > > instance of generic products **after** they have been sold, since


> > 


> > > `stock.production.lot` is very tightly tied to stock operations.


> > 


> > > We need to have product instances already during the whole CRM,


> > Quote,


> > 


> > > SaleOrder process. I don’t see how to easily put


> > `stock.production.lot`


> > 


> > > on `sale.order.lines`.


> > 


> > > The other option would be just going for `product.product` and


> > assume


> > 


> > > product == product instance.


> > 


> > > I’m not really sure about benefits/drawbacks or maybe


> > other/better


> > 


> > > approaches.


> > 


> > > 


> > 


> > > Please give me your opinions about what model is best to use as a


> > base


> > 


> > > for selling unique items in odoo.


> > 


> > > Thanks. Regards, Peter


> > 


> > > 


> > 


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> > 


> > > 


> > 


> > > 


> > 


> > > [1] 


> > https://github.com/OCA/sale-workflow/tree/12.0/sale_order_lot_selection


> > 


> > > [2] 


> > https://github.com/OCA/sale-workflow/tree/12.0/sale_order_lot_generator


> > 


> > > [3] https://github.com/OCA/sale-workflow/pull/1144


> > 


> > > [4] http://akretion.com


> > 


> > > [5] mailto:peter.hahn@initos.com


> > 


> > > [6] https://odoo-community.org/groups/contributors-15


> > 


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Dr.-Ing. Frederik Kramer
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