Stability and reliability of workpiece positioning during use.

2. Sufficient holding or clamping force to ensure the machining process of the workpiece on the fixture.

3. Simple and quick operations during the fixture process.

4. Fragile parts must be designed for quick replacement, ideally without the need for additional tools when conditions are sufficient.

5. The reliability of repeated positioning during fixture adjustment or replacement.

6. Minimize complexity and costly structures.

7. Prefer standard components as assembly parts whenever possible.