Most B2B companies have order approval rules for purchase orders. Companies can control who can create purchase orders and how much they can spend. For example:
Any PO less than X value is automatically approved.
POs over X value but less than Q must be approved by Y.
Any PO over X value must be approved by Y and Z.
A PO created by anyone at the Director level or above is automatically approved.
With the required permissions for their role, B2B customers can set up approval rules to enforce company policies.