Architecture Development Method(ADM)

Phase A: Architecture Vision:

   Beginning with the Architecture Vision phase, which lays the groundwork for other stages like Business Architecture, Information Systems Architecture, and Technology Architecture, the ADM is where it all begins. It acts as a point of reference for the architecture creation process, ensuring that the architecture stays in line with the specified vision. The goal of the architecture vision phase is to create a high-level picture of the intended architecture. In the instance of T- Mobile, this phase would specify the broad objectives and strategic vision for the communications infrastructure.

Phase B: Business Architecture:

   TOGAF is an enterprise architecture framework that helps define business goals and align them with architecture objectives around enterprise software development (White). The Business Architecture phase contributes significantly to the Information Systems Architecture and Technology Architecture phases that follow. It aids in outlining how IT systems and technology should support and facilitate the recognized business processes and capabilities. As a point of reference for ensuring that architectural choices are in line with business demands and objectives, business architecture is still essential throughout the ADM. Modeling the organization's commercial components is part of this phase. T-Mobile would examine its organizational structure, organizational competencies, and business processes as they pertain to telecommunications services.

Phase C: Information Systems Architecture:

   The results of preceding phases, especially the Business Architecture phase, are built upon in the Information Systems Architecture phase. It synchronizes IT solutions with the established business capabilities, objectives, and processes. This phase's architecture forms the foundation for later phases, such the technology architecture phase, which chooses and specifies hardware and infrastructure components. We create the information systems architecture, including the data and application architectures, in this phase. To provide Telecommunications services, T-Mobile would specify its network and IT systems, applications, and data needs.

Phase D: Technology Architecture:

   The outcomes of earlier phases, especially the phase that dealt with information systems architecture, are built upon in the phase that deals with technology architecture. It synchronizes the infrastructure and technological elements with the planned information systems and applications. As comprehensive implementation plans and projects are built in later phases, such the Opportunities and Solutions phase and the Migration Planning phase, the architecture created in this step is a crucial input to those phases. The technological infrastructure and platforms are the main topics of the technology architecture phase. For T-Mobile, this involves deciding on and creating the telecommunications technology stack, which includes network infrastructure, hardware, and software.

Phase E: Opportunities and Solutions:

   I thought that writing this series will let me review the TOGAF content and believe that it would be valuable to others. It is always a good practice to regularly review the contents of a topic that you have learned (Cecil).The ADM's early phases, particularly the Business Architecture and Information Systems Architecture phases, are strongly related to the Opportunities and Solutions phase. It expands on the comprehension of architectural requirements and business needs. The Solution Portfolio created during this phase is an essential component of other phases, such as the Migration Planning phase, which develops specific strategies for putting chosen solutions into practice. For putting the architecture into action, you find and assess potential solutions in this phase. To supply telecommunications services, T-Mobile would evaluate alternative technological options, suppliers, and methods.

Phase F: Migration Planning:

   Planning the transition from the present state to the goal design is crucial during this stage. T- Mobile would draft a migration plan outlining the steps necessary to install the new communications architecture. When it comes to the Implementation Governance phase, which is where migration projects are monitored and managed, the migration plan created during this phase is a crucial input.

Phase G: Implementation Governance:

   The goal of implementation governance is to make sure that the architecture is implemented as planned. To oversee the application of telecom solutions, T-Mobile would set up governance structures. As it aids in managing changes and preserving alignment with business goals, the governance framework created during this phase remains pertinent throughout the architecture development process and beyond.

Phase H: Architecture Change Management:

   During this stage, the architecture must be managed as it evolves. T-Mobile would regularly assess and modify the architecture to satisfy changing commercial and technological requirements in the telecommunications sector. The Opportunities and Solutions phase in particular, as well as other ADM phases, are strongly tied to the Architecture Change assessed and carried out as intended.

       LAYERVIEW

Let's break it down in a simple way:

1. Business Layer:

What It Represents: This is the layer where business concepts are defined. It includes things like strategies, objectives, processes, and organizational structures.

Why It's Important: It helps us understand the business goals, how processes work, and how the organization is structured.

2. Application Layer:

What It Represents: This layer deals with software applications and their interactions. It includes specific software systems, their interfaces, and how they communicate.

Why It's Important: It shows us the technology applications used by the organization and how they support business processes.

3. Technology Layer:

What It Represents: This is the layer of infrastructure – the hardware, networks, and IT facilities that support applications.

Why It's Important: It provides insight into the technical foundation that applications rely on, including servers, databases, and networks.

   In essence, the Layer View in ArchiMate allows businesses to see their architecture from different levels of abstraction, enabling a holistic understanding of the enterprise and aiding in effective decision-making and planning.