In the consumer electronics industry, particularly in smartphone manufacturing, the flatness of the smartphone frame is a critical quality metric. Frame flatness not only affects the aesthetic appeal of the device but also plays a significant role in ensuring proper assembly and functionality.

Any deviations in flatness can lead to issues such as improper fitment of components, decreased structural integrity, and compromised user experience. Therefore, manufacturers face the challenge of efficiently and accurately measuring frame flatness to ensure that only frames meeting stringent quality standards proceed to assembly.