Which TMMi level 3 process area includes the specific practice Establish the Organization’s Test Process...

The specific practice "Establish the Organization’s Test Process Database" is found within the Test Lifecycle and Integration process area, which is part of TMMi Level 3. This process area aims to establish standardized test processes across the organization, including maintaining a test process database that holds process-related information and data for reuse and continuous improvement.

TMMi References:

The Test Lifecycle and Integration process area is responsible for establishing and maintaining organizational test process assets, including the test process database​​.