What is the common tolerance range for reference point measurements?

The common tolerance range for reference point measurements in unitized structural body repair is indeed typically from +/-0.3mm to +/-1mm. This tolerance range is crucial for ensuring the accurate placement and alignment of structural components during repair.

Achieving precise measurements within this tolerance is vital because even small deviations can lead to significant issues in the fit and function of the vehicle's body. Maintaining alignment affects not only the aesthetic aspect of the repair but also the safety and performance of the vehicle, especially in terms of handling and collision safety.

Tolerances stricter than this may not be feasible in a practical repair setting, where variations can occur due to different factors like equipment calibration or operator technique. Therefore, this range strikes a balance between achievable precision and practical application in body repair scenarios.