IT Architecture Design is an important aspect of Service Design, as explained in ITIL training. IT architecture’s purpose is to create a solid foundation upon which new services, or updates to existing services, can be built. This is similar to building a foundation for a new building. Architectural design requires the ability to reconcile multiple needs, some of them in conflict.
Architectural design requires the ability to balance many needs. These include equipment, data, applications, and external services. The ITIL course explains. The service provider’s IT infrastructure must be able to support the provision of new services or updates to existing services. The IT infrastructure of the service provider must also be capable of supporting new services. These should be considered when designing new services and updating existing services in the service design phase of the ITIL Lifecycle for Services.

IT architecture’s scope
When designing an IT architectural setup for an IT service, there are many issues that IT service managers and IT service designers must reconcile.
These include the higher-level aspects of IT service design and overall macroscopic system structure
These are the critical aspects that have a significant impact on the service’s performance and its stakeholders
It is difficult to change aspects that are not easily changed. This is especially important when improving existing services. Some aspects of a service can’t be changed once it is implemented. Service designers must incorporate these aspects into their IT architectural design.

IT Architecture: The benefits
IT architecture provides a foundation for the analysis of service behavior prior to the service being built. It allows the team verify that the service will meet all stakeholders’ needs. It also provides a foundation for the reuse of elements and decisions. This allows for future updates to existing services and new services that share many similarities with existing services. IT architecture
IT architecture supports early design decisions that have an impact on the ITIL Service Transition, and ITIL Service Operation phases of the ITIL Lifecycle. It is possible to avoid unnecessary expenses and ensure that the project is completed on time by making the right decisions early. IT architecture facilitates communication between stakeholders to ensure that they can deliver a system that meets their needs. Understanding the technical implications of their needs is essential for all stakeholders. This will allow for the right design decisions to be made before the system is implemented, and allows for adaptation if necessary. IT architecture can also help with cost reduction and risk management.

Activities in IT Architecture Core
There are a few key activities that are related to the process of IT architectural design, as shown in online ITIL classes
Architectural Analysis
This is the process of understanding how the environment will work and the requirements required to allow the service run in these conditions. Examples include functional requirements, quality requirements and maintainability and transferability.
Architectural Synthesis
This is the process of creating architecture. The design is created and improved by the requirements that were established during the analysis phase.
Architecture Evaluation
IT architecture evaluation is the process by which a current design meets the requirements. An IT architect can complete an evaluation after making a design decision, designing a portion of the service, or after the final design is completed.