According to Juran, how many factors will significantly change a system when many factors influence it?

Juran proposed the idea of the "vital few" versus the "trivial many," suggesting that within any system influenced by numerous factors, a small number of critical factors will have a disproportionately large impact on the system's performance and outcomes. This concept aligns with his focus on identifying and managing key variables that drive quality improvement.

By concentrating on these vital few factors, organizations can achieve substantial improvements in their processes, as addressing the most significant issues allows for more effective resource allocation and a clearer path to enhancing quality. In this context, the correct understanding is that while many factors may play a role, only a select few will be crucial in effecting meaningful change within a system. This principle emphasizes prioritization and strategic focus in quality management and improvement initiatives.