The functional testing of the test fixture is categorized based on different control modes, which can be divided into fully automatic control function testing, manual control function testing, and semi-automatic control function testing. The earlier functional tests primarily focused on traditional manual and semi-automatic methods.

To simplify the design of test fixtures and reduce manufacturing costs, many manufacturers still opt for manual or semi-automatic fixture testing for some simple test products. However, the majority still use fully automatic test fixtures.

Another more common classification is based on the controller type used in functional testing. Common control methods in functional testing include ICT control and embedded ICT control, among others. The ICT control method can be considered a simple form of embedded control.

The embedded control method of ICT and test fixtures boasts features such as rapid test execution, straightforward test operations, specialized circuits and programs for display and data output, targeted test schemes, and convenient modifications to test software.

Our introduction to the functional testing of test fixtures comes to an end here. It's evident that, according to different standardizations, test fixtures also vary. Currently, fully automated test fixtures are still the most widely used.