A scope pack that suppliers can’t reinterpret. Performance criteria you can actually check. Clear boundaries between what each party is responsible for. And a design that can be extended without rebuilding from scratch.
Vendor-ready requirements: What a supplier must propose and provide.
Information & approval criteria: How performance is checked and approved.
Connections & handover readiness: Where boundaries are, and what is required at handover.
Upgrades & roadmap: How to modularise and plan staged improvements.