In order to more clearly explain the essence of functional and system testing, you may consider examples of the tests performed at this stage.
Evaluation Against The Requirements Specification
It is the process of evaluating the product to determine whether or not it meets the specification. By the way, quality assurance service is used to systematically check whether the software being developed is complying with specified requirements.
Correctness
Does the program perform the necessary calculations and generate reports correctly?
Laboratory Test
Testing specialist hires several people from among the future users and sees them working with the product. In fact, beta testing is an attempt to get the same results for less cost. But since you are not a direct witness of what is happening and cannot assign tasks to testers, beta testing is much less effective than laboratory testing and analysis.
Quality assurance organizations monitor engineering processes and techniques used to ensure the product quality. QA is an integral part of development lifecycle, it aims to manage quality from the beginning to the end. However, it focuses on preventing errors rather than identifying them. In many cases, quality assurance purses the same goals as software testing do.
Boundary Conditions
Many app errors occur at the boundaries of input domain, so you need to check the program’s response to input and output data values at the boundary points. Enter the data in response to which the software will generate maximum or minimum values of output.
Performance
Get a good stopwatch and measure the runtime execution of various tasks, especially those that will be performed by the user most frequently.
Transitions Between Modes
Does the program correctly transit from state to state? This is especially important for applications that allow users to perform several different actions in parallel, or switch between modes without having to terminate their operation. What if you try to print or generate editable table or write a report on it? What will happen if you enter new data into a table during creation of the report?
Using a Program In Real Mode
Try to run a program in the same mode, which will be used by real people while working with it. Use this app to do a real job. You will be very surprised to see how many errors are identified during such testing. Disadvantages, which were left unnoticed or considered as insignificant in formal testing, can appear to be very serious while doing the actual work.
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