Two things about reordering rules in v12:
- It would be really nice if reordering rules could be assigned to a product category, instead of only to individual products. Partcularly if you use product variants, that are only created when a customer order that particular variant.
- It seems a little strange how the Minimum Quantity rule is defined. If I set the Minimum Quantity for a product to 0, and we have 0 units on hand, then a manufacturing order will be generated when we run the scheduler. To me the minimum quantity of 0 means that it is ok to not have any units in stock, and a manufacturing order should only get generated if the forecast quantity goes below 0.
As for reordering rules per product categories: have a look at this app - https://apps.odoo.com/apps/modules/12.0/min_rules_per_category/