Understanding Business Architecture (EBA): Definitions, Dimensions, and Influencing Factors

Business Architecture

Business architecture serves as a bridge between an enterprise’s business model and its strategy on one side, and between business functions on the other.

Definition – “The part of enterprise architecture related to the company’s business, together with the documentation and diagrams that describe the structure of that business architecture.”

What EBA Is Not

EBA is not merely a process view – business processes are evolving to support analytics, social networking, and collaboration, requiring a more complex, dynamic, integrated view that equally considers people, finance, processes, and organization.

EBA is not the only business link – while EBA and enterprise business architects connect to business, EA requires all viewpoints (business, information, technology, solution) to be directly linked and collaborative with key business domains.

EBA Dimensions

The four main dimensions of EBA (people, finance, process, and organization) are defined within business functions (see Figure 1). Business functions and sub‑functions can be supported by complete or partial processes, people, and/or organizational entities, and there is often no one‑to‑one mapping between functions and specific processes, people, or entities.

People – focuses on individuals who directly affect the business, including employees, contractors, partners, suppliers, and consultants.

Finance – looks at how the enterprise manages its financial resources to support future states.

Organization – refers to both formal (reporting structures) and informal (virtual teams, culture, social networks) structures.

Process – a collection of activities that transform a system from one state to another, encompassing operational, management, support, meta‑processes, and IT processes.

Figure 1

Influencing Factors

Key factors that may affect EBA include:

Compliance – the degree to which different business functions are subject to regulatory requirements.

Ecosystem – the extent to which an organization collaborates with external partners, suppliers, and cloud resources to create growth opportunities.

Culture and Politics – organizational culture and internal politics that vary across groups, roles, departments, and regions, especially during mergers and acquisitions.

Industry – reflects the specific industry focus of the business, emphasizing that no single EBA approach fits all sectors.

Region/Location – highlights regional differences, crucial for European Banking Authority (EBA) considerations.

Innovation – the degree to which innovation is encouraged across parts of the organization, influencing roles, structures, technology support, and investment types.

Behavior – individual user behaviors and preferences that drive demand for IT and business support.

Time – a reminder that EBA and EA are evolving projects, not static, with changes driven by people, market, and innovation over time.

Defining Enterprise Context

Enterprise Architecture (EA) translates business vision and strategy into effective enterprise transformation. EA practitioners must define and drive their work based on the enterprise context, which includes:

Identifying internal and external environmental trends

Clarifying business strategy

Determining requirements

Creating guiding principles

Developing an anchor model for the business

The enterprise context informs all EA viewpoints (Enterprise Technology Architecture, Enterprise Information Architecture, Enterprise Solution Architecture, and Enterprise Business Architecture) to ensure strategic alignment.

Figure 2

Business Context and Business Architecture

The business context of EA expresses business strategy, external trends, and a high‑level future vision, informing all EA work and viewpoints to ensure strategic consistency.

Enterprise Business Architecture (EBA) is one EA viewpoint that, together with ETA, EIA, and ESA, should leverage the business context. The goal of EBA is to ensure that changes and enhancements to business functions, processes, finance, people, and organization are optimized and aligned with business strategy.

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