Increasing the number of inspections is unlikely to have what effect?

Increasing the number of inspections is unlikely to significantly reduce the number of parts that are out of spec for several reasons. While more inspections can help identify defective parts after they have been produced, they do not address the root causes of production defects.

Quality issues typically stem from variations in the manufacturing process, equipment malfunctions, or substandard raw materials. If these underlying issues are not resolved, increasing inspections may catch more defects but will not inherently prevent them from occurring in the first place. Consequently, a higher inspection rate alone may lead to more identified defects without meaningfully decreasing their occurrence in the initial production phase.

This means that while inspections can help confirm quality and catch errors, they are more of a reactive approach to quality control. In contrast, improving process efficiency, reducing production time, or enhancing product quality often require proactive measures that address the manufacturing process itself rather than just checking the products after they are made. Thus, while inspections play an important role in quality assurance, they cannot guarantee a decrease in defects if the root causes are not adequately managed.