Architectural Design

  What are Context Diagrams? Context Diagrams are high-level visual representations that show the interactions between a system being developed and its external entities, such as users, other systems, or processes. They provide a big-picture view of how the system fits into its environment without diving into the internal details of the system itself. Typically, they consist of a central system surrounded by external entities, with arrows representing data flow or interactions between them. They're useful for understanding system boundaries and dependencies. Importance of Context Diagrams in Systems Analysis Scope Definition: Context diagrams define the system's boundaries by highlighting its interactions with external entities, ensuring that the analysis focuses on pertinent components and processes. Requirement Gathering: These diagrams visualize how the system interacts with its environment, aiding in identifying both functional and non-functional requirements. They offer cl...

  ARCHITECTURAL DESIGN As architectural design begins, the software to be developed must be put into context-that is, the design should define the external entities (other systems, devices, people) that the software interacts with and the nature of the interaction. An archetype is an abstraction (similar to a class) that represents one element of system behavior. The set of archetypes provides a collection of abstractions that must be modeled architecturally if the system is to be constructed. ARCHITECTURAL DESIGN Representing the System in Context At the architectural design level, a software architect uses an architectural context diagram (ACD) to model the manner in which software interacts with entities external to its boundaries. The generic structure of the architectural context diagram is illustrated here, Referring to the figure, systems that interoperate with the target system are represented as Representing the System in Context Uses an architectural context diagram (ACD)...

  Software architecture alludes (talk about) to "the overall structure of the software and the ways in which that structure provides conceptual integrity for a system. Shaw and Garlan describe a set of properties that should be specified as part of an architectural design: Structural properties. Extra-functional properties. Families of related systems. Structural properties: Architectural design representation defines the components of a system (e.g., modules, objects, filters) and the manner in which those components are packaged and interact with one another. For example, objects are packaged to encapsulate both data and the processing that manipulates the data and interact via the invocation of methods. Extra-functional properties. The architectural design description should address how the design architecture achieves requirements for performance, capacity, reliability, security, adaptability, and other system characteristics. Families of related systems. The architectural des...

  Key Activities in Architectural Design 1. Understanding Requirements and Constraints Before designing, a deep understanding of both functional (what the system does) and non-functional requirements (how well the system performs, its security needs, scalability, etc.) is essential. Constraints, such as budget, timeline, existing technologies, or regulatory compliance, also heavily influence design choices. 2. Identifying System Context Define how the software system interacts with external entities (users, other systems, hardware). This helps in establishing clear boundaries and interfaces. Tools like  Context Diagrams  are often used here. 3. Decomposing the System (Structural View) This involves breaking down the overall system into logical, cohesive, and loosely coupled components or subsystems. This step aims to manage complexity by dividing the problem into smaller, more manageable parts. 4. Defining Component Responsibilities and Interfaces For each identified comp...

  🔹 What is Architectural Design? Architectural design is the blueprint of a software system. Just like architects design buildings before construction, software architects define the structure, components, and interactions of a system before coding begins. It acts as a bridge between requirements and implementation, ensuring the system is scalable, maintainable, and reliable. --- 🔹 Why is it Important? Ensures clarity before development starts. Helps in risk management by identifying bottlenecks early. Makes the system scalable and flexible for future changes. Provides a shared vision for developers, testers, and stakeholders.