Which practice has a purpose that involves creating closer, more collaborative relationships?

The purpose of the supplier management practice is to ensure that the organization’s suppliers and their performances are managed appropriately to support the seamless provision of quality products and services1. This practice involves creating closer, more collaborative relationships with key suppliers to improve efficiency, effectiveness, and innovation2. References: ITIL Foundation - ITIL 4 Edition, page 16; ITIL® 4 – A Pocket Guide, page 38.