There is an age-old expression that says “First impression is the last impression”. This is a hard truth in today’s world. If you fail to deliver the correct product first time, your client will simply move on to the next thing. A fault, if encountered, may cause a failure, which is a deviation of the software from its expected output. Reliability is the probability that software will not cause the failure of a system for a specified time under specified conditions.
So, first of all, what is testing?
Testing is the measurement of software quality. It is the practice of making objective judgments regarding the extent to which the system (device) meets, exceeds or fails to meet stated objectives.
What is the purpose of testing?
There are two fundamental purposes of testing: verifying procurement specifications and managing risk. First, testing is about verifying that what was specified is what was delivered: it verifies that the product (system) meets the functional, performance, design, and implementation requirements identified in the procurement specifications. Second, testing is about managing risk for both the acquiring agency and the system’s vendor/developer/integrator.
Why is testing important?
A good testing program is a tool for both the agency and the supplier; it typically identifies the end of the “development” phase of the project, establishes the criteria for project acceptance, and establishes the start of the warranty period.
1. Testing is always needed for correctly understanding the fault errors in software during its development phases.
2. It is necessary because it always ensures the users or customers satisfaction and reliability of the application.
3. It is needed in software development to increase the reliability and quality of the software.
4. Testing is needed to provide the various facilities to the users like delivery of high quality software or application.