Improve quality
Computers and software are widely used in key areas, such as medical diagnosis, aircraft and air traffic control, space shuttle missions and stock market reports. The existence of defects in software applications will lead to irreparable losses. Software quality is the most important, and it is the job of software testing engineers to ensure that software meets quality standards.
Used for verification and confirmation.
The verification and confirmation of software products is the process of determining whether the system meets its predetermined goals and whether the output is correct. The planning of this testing phase begins early in the software development life cycle. Verification and confirmation can be carried out by the same organization that develops the product, but it will be more effective if it is carried out by an independent testing organization.
Used for reliability evaluation
From the user's point of view, reliability means the reliability of software products. In medical diagnosis, wrong advice to doctors will lead to loss of life. Conduct a comprehensive functional inspection of key software products.
Prove availability and operability
A very important purpose of software testing is to prove that the software is available and operable. Usability testing is to release the software to a selected group of users and observe their use of the product. All aspects of user interaction with software, such as usability and problems faced by users, are recorded and analyzed.
Prevent defect migration
Most errors are usually introduced in the software requirements collection stage. If errors are found in the early stage, they can be prevented from being transferred to the subsequent development stage. Early detection and debugging of errors can save a lot of software development costs.