# Supply on sale with production request

**URL:** https://discuss.tryton.org/t/supply-on-sale-with-production-request/2167
**Category:** Feature
**Tags:** production, sales
**Created:** [January 10, 2020, 1:28pm UTC](https://discuss.tryton.org/t/supply-on-sale-with-production-request/2167 "2020-01-10T13:28:51Z")
**Posts on this page:** 1
**Showing post:** 8

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### 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: [March 10, 2020, 11:37am UTC](https://discuss.tryton.org/t/supply-on-sale-with-production-request/2167/8 "2020-03-10T11:37:18Z")

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I have trouble with the “nested” productions. The main is that a production can be changed (quantities, BoM etc.) until it is running. So this means that creating nested order before will require a complex synchronization mechanism with major difficulties like: “What to do with a nested productions is running but the BoM of the main one is changed and no more required the running one”…  
I think the “nested” production is a false problem or at least it is not a good solution to the real problem.  
I see two cases:

- The production is indeed composed of multiple BoM (to ease management) but it should be treated as a single production. This should be solved with phantom BoM.

- The main production requires materials that are unique. So they are many possible improvements here:

So for me, the `sale_supply_production` should only manage to create the first level of production.

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