Many clients build websites and apps using the Agile development methodology where features are worked on and released to the test environment as part of a regular sprint.
Our involvement is to spend some time testing during each sprint, which would usually include test planning, management and reporting as well as different types of testing for functionality, browser compatibility, etc.
Agile testing requires regular communication with the development team so that we can identify the testing required, conduct the testing in a timely manner and provide feedback quickly.
We would organise the level of testing required with you prior to the project starting and then allocate sufficient time for testing each sprint.
If you adopt Agile then we can fit in with your process and have experience of doing that already for many other clients.