Which factor is not mentioned as affecting work to be achieved?

Frequent meetings are not typically cited as a factor affecting the work to be achieved when compared to the other options listed. While meetings can sometimes impede productivity or focus, they are generally seen as a necessary component of communication and collaboration within a team. In contrast, factors like staff absence, changing deadlines, and staff changes directly impact the availability of resources and the structure of the workload, making them more critical concerns in assessing productivity and work completion. By focusing on direct impacts on staffing and deadlines, the other options highlight issues that can cause significant disruptions to the work process and the ability to meet goals effectively.