How can I create or edit permission roles in SAP Business Network?

Only Admin can create a Role in SAP Business Network Buyer Account

1. Click [User Initial] > Settings > Users
2. Click + to create a new role
3. Enter Name and Description for the role
4. Select Permissions
5. Click Save

Buyer administrators can define roles with a specific set of user permissions that determine what the assigned users can see or do in SAP Business Network.

See Creating a Role for more information

SAP Business Network for Procurement & Supply Chain > Administration (Buyer & Supplier Account Administration)
SAP Business Network for Procurement & Supply Chain > SAP Ariba Supply Chain Collaboration