I've been instructing students on the ISTQB-CTFL Certification curriculum for a number of years now.  I like to tell students the CTFL program is really a mini project-management training program.

Somebody hands you a software app to test, what do you do now?  You decompose the App in to smaller portions which make sense to you, constructing a Work Breakdown Structure.  Then you identify items to test within the WBS, organizing them by Test Plans. They you prioritize all test plans into a Test Execution Schedule so and your test team will know in what order to perform the tests.

You'll keep track of test coverage, and results, reporting on progress as you work through the app. Here's where it's important to communicate with your developers thoroughly so they can fix bugs you find and get the updated app install back to you for confirmation testing.

finally, when your testing matches the success criteria, you'll report of the final results of your findings and wrap up the testing project, adding lessons learned, estimates vs. actual, and other information into a test historical repository.

All of these activities are the foundation for project management.