When starting a software development then should focus on software quality attributes before start development. Quality is very important to run a successful software and business, so all team members should be familiar about software quality attributes before start implementation on any phase of software.
System reliability produces expected output by giving inputs. System reliability depends on errors and if very low priority errors are there with system then system reliability will be more. Means, system reliability comes from correctness and expected behavior by giving inputs.
Availability comes from needed features of system for users. It means system covers features those are needed for developing a software with expected purposes to make availability about what users will be expecting during use of system for getting reply and successful result about given request.
It depends on how system behave after getting request. When system response correct behavior about any given request then system correctness rate will be high. Means, written programs should have implemented according to provided specifications for getting correctness of system.
System usability depends on user’s experience and what is satisfaction rate by using system. If users are happy with friendly behavior of system then usability rate will be high and it will good for software quality.
Extensibility is about modification in systems without any side effects and to have error free all features of system after changes. When possibilities of any side effect is less on changes then extensibility rate of system will be high.
This attribute define how much system is capable to be connected to other system and what is capability rate to communicate with other systems. If system gets connected with other system perfectly and communicate with very friendly behavior then interoperability standard rate will be high.
It defines security rate of system. Means how much system should be secured by communicating from one end to other end. How much data is secured of users and how securely system gives access for authorized user. Security of system should be very high in rate always.
Performance depends on what is response rate of any request. Should be high with requests of some users and many users. System performance is measured on response and response should be very high when users communicate with system for getting response on any query/request.
Portability is about to develop a system where it can work in other operating system and different software/hardware configuration other than it was created with different one. System works in different platform without making changes or any major changes then system portability rate will be high.
System scalability good rate depends on how easy to manage changes on demand and to make enhancement to grow business easily by doing changed in system according to users need. If system is well programmed to manage changes on demand without any loss then scalability rate will be good.
It is about to develop requirements for fulfill system’s needs with necessary resources. Means to create a system for getting all needed feature with minimum amount of resources and get to know how to save time and extra effort. Need to decide what code and efforts are required to implement particular function.
Maintainability rate depends on how easily we can make changes or repair system without getting any error. Improvements for system should be very friendly not enough complexity should be there for changes. If easy to repair rate is high then maintainability rate will be high.
It depends on conditions like how easy to perform test execution according to given conditions. Program execution ability is easy to run without enough complexity. Means how easily written program can be tested. If execution can be done easily then testability rate will be high.
It depends on how system can handle changes in its developed environment without any problem. A developed system can improve features without any unexpected behavior in system’s environment. If system easily handle changes in environment then adaptability rate will be high.
Note:- These are basic quality attributes and challenges may be more according to system’s need and requirements.