A phased implementation diagram focuses specifically on showing which products are implemented in each phase of a ServiceNow rollout. It provides a visual representation of the implementation timeline and the planned deployment of different ServiceNow products or modules over time.

How it differs from a capability map:

Capability Map: A capability map provides a broader view of the ServiceNow platform and its capabilities. It maps business processes or functions to the ServiceNow products that support them. It's not specifically tied to implementation phases.

Why not the other options?

A. It provides an overall picture of all products in use: This is more aligned with a capability map.

B. It maps end-user requirements to products: While this might be considered during implementation planning, it's not the primary purpose of a phased implementation diagram.

D. It tracks products migrated across phases: While migrations might be part of the implementation, the diagram focuses on showing what's implemented in each phase, not the migration process itself.