How does IPC define the term "critical characteristics" in assembly?

The term "critical characteristics" in assembly refers specifically to the features that are crucial to the performance and function of a product. These characteristics are essential because they directly impact how the product operates and meets its intended use. If these features are not achieved or maintained within specified limits, it could lead to product failure or substandard performance.

Recognizing which features are critical helps ensure that proper quality control measures are in place during the assembly process. This focus minimizes the risk of defects and enhances the reliability and safety of the final product, making it vital for manufacturers and assemblers to understand and prioritize these critical characteristics in their operations.