Järjestelmätestausvaiheet

Järjestelmätestausvaiheet, or system testing phases, refer to a structured approach for evaluating a complete and integrated software system. This process is crucial for ensuring the system meets its specified requirements and functions correctly in its intended environment. The phases typically follow a logical progression, building upon the results of earlier testing stages.

The initial phase often involves integration testing, where individual modules or components of the system are combined and tested to verify their interactions. This helps to identify defects that arise from the interfaces between different parts of the system. Following integration testing, system testing proper begins. Here, the entire system is tested as a whole against the functional and non-functional requirements. This includes verifying that the system performs as expected under various conditions and that it adheres to performance, security, and usability standards.

Acceptance testing is a subsequent phase, often conducted by the end-users or clients. Its purpose is to determine if the system meets the business needs and is ready for deployment. This phase can be further divided into user acceptance testing (UAT), where users validate the system's functionality in a simulated real-world environment, and business acceptance testing (BAT), which focuses on whether the system aligns with broader business objectives.

Regression testing is an ongoing activity throughout these phases. It involves re-testing previously tested parts of the system after changes have been made to ensure that new defects have not been introduced and that existing functionality remains unaffected. Each phase aims to progressively uncover and resolve issues, leading to a more robust and reliable final system.