# Production outsourcing services fields

**URL:** <https://discuss.tryton.org/t/production-outsourcing-services-fields/4843>\
**Category:** User\
**Tags:** production\
**Created:** [December 10, 2021, 9:05am UTC](https://discuss.tryton.org/t/production-outsourcing-services-fields/4843 "2021-12-10T09:05:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![acaubet](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/acaubet/32/1493_2.png) [@acaubet](https://discuss.tryton.org/u/acaubet)\
**Post date:** [December 10, 2021, 9:05am UTC](https://discuss.tryton.org/t/production-outsourcing-services-fields/4843/1 "2021-12-10T09:05:30Z")

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Hello,  
I’m trying to figure out how production\_outsoursing works, I stopped on `supplier_service_supplier` field which is not explained in the docs and also the help attribute it’s so much similar to `supplier_service`.  
supplier\_service = `The service to buy to the supplier for the production`  
supplier\_service\_supplier = `The supplier's service to buy for the production`

Which are the diferences between those fields? Which is the use case?  
Once I understand I will submit a patch to improve those help attributes.  
Thanks!

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<div class="post-metadata">

**Author:** ![ced](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/ced/32/1237_2.png) [@ced](https://discuss.tryton.org/u/ced)\
**Post date:** [December 10, 2021, 11:45am UTC](https://discuss.tryton.org/t/production-outsourcing-services-fields/4843/2 "2021-12-10T11:45:32Z")

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It is the same difference as between the `product` and the `product_supplier` on the purchase line.  
It is just the precision of which service for the supplier is used. When the `supplier_service` is the service defined by the company.