Software Architecture Business Cycle

Architecture Business Cycle (ABC)

Architecture Business Cycle (ABC): “Software architecture is a result of technical, business, and social influences. Its existence in turn affects the technical, business, and social environments that subsequently influence future architectures.

The architecture of a system describes its major components, their relationships (structures), and how they interact with each other. Software architecture and design include several contributory factors such as Business strategy, quality attributes, human dynamics, design, and IT environment. software Architecture Business Cycle is playing an important role in the latest technology enhancement because it’s one of the main components of software development. Soft services demand increases day by day because the technologies are progressing day by day.

We can segregate Software Architecture and Design into two distinct phases therefore it having 2 types. Software Architecture and Software Design. In Architecture, nonfunctional decisions are cast and separated by the functional requirements. In Design, functional requirements are accomplished.

Software Architecture

Architecture serves as a blueprint for a system. It provides an abstraction to manage the system complexity and establish a communication and coordination mechanism among components.

• It defines a structured solution to meet all the technical and operational requirements while optimizing the common quality attributes like performance and security.
• Further, it involves a set of significant decisions about the organization related to software development and each of these decisions can have a considerable impact on the quality, maintainability, performance, and the overall success of the final product. These decisions comprise of −
  • Selection of structural elements and their interfaces by which the system is composed.
  • Behavior as specified in collaborations among those elements.
  • Composition of these structural and behavioral elements into large subsystems.
  • Architectural decisions align with business objectives.
  • Architectural styles guide the organization.

Software Design

Software design provides a design plan that describes the elements of a system, and how they fit and work together to fulfill the requirement of the system. The objectives of having a design plan are as follows because we do focus upon these objectives

• To negotiate system requirements, and set expectations with customers, marketing, and management personnel.
• Act as a blueprint during the development process.
• Guide the implementation tasks, including detailed design, coding, integration, and testing.

It comes before the detailed design, coding, integration, and testing and after the domain analysis, requirements analysis, and risk analysis.

Goals of Architecture

The primary goal of the architecture is to identify requirements that affect the structure of the application. A well-laid architecture reduces the business risks associated with building a technical solution and builds a bridge between business and technical requirements.

Some of the other goals are as follows −

• Expose the structure of the system, but hide its implementation details.
• Realize all the use-cases and scenarios.
• Try to address the requirements of various stakeholders.
• Handle both functional and quality requirements.
• Reduce the goal of ownership and improve the organization’s market position.
• Improve the quality and functionality offered by the system.
• Improve external confidence in either the organization or system.

Limitations

Software architecture is still an emerging discipline within software engineering. It has the following limitations −

• Lack of tools and standardized ways to represent architecture.
• Lack of analysis methods to predict whether architecture will result in an implementation that meets the requirements.
• Lack of awareness of the importance of architectural design to software development.
• Lack of understanding of the role of software architects and poor communication among stakeholders.
• Lack of understanding of the design process, design experience, and evaluation of the design.

Role of Software Architect

A Software Architect provides a solution that the technical team can create and design for the entire application. A software architect should have expertise in the following areas −

Design Expertise

• Expert in software design, including diverse methods and approaches such as object-oriented design, event-driven design, etc.
• Lead the development team and coordinate the development efforts for the integrity of the design.
• Should be able to review design proposals and tradeoffs among themselves.

Domain Expertise

• Expert on the system being developed and plan for software evolution.
• Assist in the required investigation process, assuring completeness and consistency.
• Coordinate the definition of the domain model for the system being developed.

Technology Expertise

• Expert on available technologies that helps in the implementation of the system.
• Coordinate the selection of programming language, framework, platforms, databases, etc.

Methodological Expertise

• Expert on software development methodologies that may be adopted during SDLC (Software Development Life Cycle).
• Choose the appropriate approaches for development that helps the entire team.

Hidden Role of Software Architect

• Facilitates the technical work among team members and reinforces the trust relationship in the team.
• Information specialist who shares knowledge and has vast experience.
• Protect the team members from external forces that would distract them and bring less value to the project.

Deliverables of the Architect

• A clear, complete, consistent, and achievable set of functional goals
• A functional description of the system, with at least two layers of decomposition
• A concept for the system
• A design in the form of the system, with at least two layers of decomposition
• A notion of the timing, operator attributes, and the implementation and operation plans
• A document or process which ensures functional decomposition is followed and the form of interfaces is controlled

Software Quality Attributes

It is a measure of excellence or the state of being free from deficiencies or defects. Quality attributes are the system properties that are separate from the functionality of the system.

Implementing quality attributes makes it easier to differentiate a good system from a bad one. Attributes are overall factors that affect runtime behavior, system design, and user experience.

They can be classified as −

Static Quality Attributes

Reflect the structure of a system and organization, directly related to architecture, design, and source code. They are invisible to end-user but affect the development and maintenance cost, e.g.: modularity, testability, maintainability, etc.

Dynamic Quality Attributes

Reflect the behavior of the system during its execution. They are directly related to the system’s architecture, design, source code, configuration, deployment parameters, environment, and platform. They are visible to the end-user and exist at runtime, e.g. throughput, robustness, scalability, etc.

Quality Scenarios

Quality scenarios specify how to prevent a fault from becoming a failure. They can be divided into six parts based on their attribute specifications −

• Source − An internal or external entity such as people, hardware, software, or physical infrastructure that generates the stimulus.
• Stimulus − A condition that needs to be considered when it arrives on a system.
• Environment − The stimulus occurs within certain conditions.
• Artifact − A whole system or some part of it such as processors, communication channels, persistent storage, processes, etc.
• Response − An activity undertaken after the arrival of stimulus such as detecting faults, recovering from faults, disabling event source, etc.
• Response measure − Should measure the occurred responses so that the requirements can be tested.

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