In the Preliminary Phase, which of the following drives the requirements and performance metrics when scoping the enterprise architecture work?

In the Preliminary Phase, the scope, constraints, and assumptions for the architecture work are defined. This effort is fundamentally driven by the organization's strategic direction and business drivers. Business imperatives represent these critical, high-level goals and drivers that the enterprise architecture must support. They directly inform the requirements for the architecture capability and the performance metrics that will be used to measure its success in achieving business outcomes. The entire architecture effort is justified by its ability to address these core business needs.

A. Architecture governance is the framework for control over the architecture process; it is established in this phase but does not drive the initial requirements.
C. Solution architecture is a detailed architecture for a specific system, developed much later in the ADM cycle, not a driver in the Preliminary Phase.
D. Service level agreements are specific, operational-level contracts, which are too granular to be the primary driver for scoping the entire enterprise architecture.
E. Time horizon is a scoping constraint or parameter, influenced by the business imperatives, rather than being the primary driver of requirements itself.

1. The Open Group Standard, TOGAF® Version 9.2, 2018, Chapter 6: Preliminary Phase. Section 6.3, Inputs, lists "Business strategies, business goals, and business drivers" as key inputs that shape the work.

2. The Open Group Standard, TOGAF® Version 9.2, 2018, Chapter 5: Introduction to the ADM. Section 5.1 states that the ADM is iterated to develop an enterprise architecture that addresses business and IT needs.