Imagine that a company has many subsidiaries.

1 - The employees in the main company can see all about the subsidiaries (EX: can see the inventory in each subsidiary + thier inventory).

2- The employees in each subsidiary can see only what is in thier subsidiary (EX: can see only thier inventory).

3- We can add/remove a subsidiary only by the main company's employees.

Any ideas how to do/design this using odoo 9 ?