Importance of software architecture
- 1. Dr. Himanshu Hora SRMS College of Engg. & Tech., Bareilly INDIA
- 2. • Software is the root cause of most of today’s system problems. • The quality and longevity of a software system is determined by its architecture.
- 3. Typically software architecture includes ad hoc box and line drawing(s) of the system that is intended to solve the problems articulated by the specification. • Boxes define the elements or “parts” of the system. • Lines define the interactions or the between parts. A software architecture is a “first cut” at solving the problem and designing the system.
- 4. “The software architecture of a program or computing system is the structure or structures of the system, which comprise software elements, the externally visible properties of those elements, and therelationships among them.” Bass L.; Clements P.; Kazman R. Software Architecture in Practice
- 5. Defines the properties of components • Properties of components are assumptions that one component can make about another: - provided services, required services, performance characteristics, fault handling, resource usage
- 6. Just having an architecture is different from having an architecture that is known to everyone.
- 7. Represents earliest design decisions First design artifact addressing Key to systematic reuse • hardest to change • most critical to get right • communication vehicle among stakeholders • performance • reliability • modifiability • security • transferable, reusable abstraction The right architecture paves the way for system success. The wrong architecture usually spells some form of disaster.
- 8. Functional requirements define • what the system must do • how components will interact, cooperate, and synchronize correctly • what it means to “function” properly Functionality is largely orthogonal to the structure. • how modifiable is a system that is functioning properly? Essential quality attributes are often overlooked or omitted from functional specifications and system descriptions.
- 10. ď‚ž What precisely do these quality attributes such as modifiability, security, performance and reliability mean? ď‚ž Can a system be analyzed to determine these desired qualities? ď‚ž How soon can such an analysis occur? ď‚ž How do you know if software architecture for a system is suitable without having to build the system first? ď‚ž How do you document an architecture? ď‚ž Can you recover an architecture from an existing system?
- 11. Dr. Himanshu Hora SRMS College of Engg. & Tech., Bareilly INDIA