The fundamental test process is a generic model that describes the main activities and tasks involved in testing.
The fundamental test process consists of five phases: planning and control, analysis and design, implementation and execution, evaluation of exit criteria and reporting, and test closure activities.
Implementation and execution is the phase where test cases and test procedures are implemented according to test specifications and executed on the system or component under test using test tools or manual methods.
Implementation and execution also involves verifying that the test environment set up is correct, which means ensuring that the test environment (such as hardware, software, network, data, etc.) is ready and suitable for testing the system or component under test. A detailed explanation of implementation and execution can be found in [A Study Guide to the ISTQB Foundation Level 2018 Syllabus], pages 19-21.