Software Architecture and Design Tutorial for Beginners – Learn Software Architecture and Design concepts in simple and easy steps starting from Introduction, Key Principles, Architecture Models, Object-Oriented Paradigm, Data Flow Architecture, Data-Centered Architecture, Hierarchical Architecture, Interaction-Oriented Architecture, Distributed Architecture, Component-Based Architecture, User Interface, Architecture Techniques. Software Architecture and Design, Tutorial, Introduction, Key Principles, Architecture Models, Object-Oriented Paradigm, Data Flow Architecture, Data-Centered Architecture, Hierarchical Architecture, Interaction-Oriented Architecture, Distributed Architecture, Component-Based Architecture, User Interface, Architecture Software architecture and design pdf. By the end of this tutorial, the readers will develop a sound understanding of the concepts of software architecture and design concepts and will be in a position to choose and follow the right model for a given software project.
This tutorial is designed for all software professionals, architects, and senior system design engineers. Managers of architecture teams also will be benefited from this tutorial. There is no exact prerequisite for this tutorial. Any software professional can go through this tutorial to get a bigger picture of how high quality software applications and products are designed. Unsourced material may be challenged and removed. Software design is the process of implementing software solutions to one or more sets of problems.
The main difference between software analysis and design is that the output of a software analysis consists of smaller problems to solve. Additionally, the analysis should not be designed very differently across different team members or groups. In contrast, the design focuses on capabilities, and thus multiple designs for the same problem can and will exist. Design examples include operation systems, webpages, mobile devices or even the new cloud computing paradigm. Software design is both a process and a model. The design process is a sequence of steps that enables the designer to describe all aspects of the software for building.
Creative skill, past experience, a sense of what makes “good” software, and an overall commitment to quality are examples of critical success factors for a competent design. Similarly, the design model that is created for software provides a variety of different views of the computer software. Basic design principles enable the software engineer to navigate the design process. The design process should not suffer from “tunnel vision. A good designer should consider alternative approaches, judging each based on the requirements of the problem, the resources available to do the job. The design should be traceable to the analysis model.
Because a single element of the design model can often be traced back to multiple requirements, it is necessary to have a means for tracking how requirements have been satisfied by the design model. The design should not reinvent the wheel. Systems are constructed using a set of design patterns, many of which have likely been encountered before. These patterns should always be chosen as an alternative to reinvention. The design should “minimize the intellectual distance” between the software and the problem as it exists in the real world. That is, the structure of the software design should, whenever possible, mimic the structure of the problem domain. The design should exhibit uniformity and integration.
A design is uniform if it appears fully coherent. In order to achieve this outcome, rules of style and format should be defined for a design team before design work begins. A design is integrated if care is taken in defining interfaces between design components. The design should be structured to accommodate change. The design concepts discussed in the next section enable a design to achieve this principle. The design should be structured to degrade gently, even when aberrant data, events, or operating conditions are encountered. Design is not coding, coding is not design.
Even when detailed procedural designs are created for program components, the level of abstraction of the design model is higher than the source code. The only design decisions made at the coding level should address the small implementation details that enable the procedural design to be coded. The design should be assessed for quality as it is being created, not after the fact. A variety of design concepts and design measures are available to assist the designer in assessing quality throughout the development process. There is sometimes a tendency to focus on minutiae when the design is reviewed, missing the forest for the trees.