Which factor does NOT affect staff competency?

Staff competency is primarily influenced by the effectiveness of training programs, the ability of an organization to retain employees, and the investment made in developing skills. Training investment directly enhances the skills and knowledge of employees, thus improving their competency levels. Retention plays a significant role as well; a consistent workforce allows for the development of expertise and mastery over time, whereas high turnover can disrupt the continuity that is necessary for competency to grow.

While employee age can influence certain aspects of workplace dynamics, such as experience levels or adaptability to technology, it does not inherently affect an individual's competency in the same way that targeted training and retention do. Competency is more about the skills and knowledge an individual possesses, rather than their age. Therefore, the factor that does not directly influence staff competency is related to employee age, as this characteristic alone does not provide a substantial impact on their professional capabilities.