Staff capacity affects the maximum achievement an organization can attain at any given point in time. Key elements include the intellectual ability, knowledge, and skills of teams and individuals, the quality and quantity of resources available to achieve outcomes, and the impact of social organization and environmental factors in the workplace.

The key word in this description is achievement. If capacity were considered only to be the sum of the resources any system could provide, that would ignore the organic view of staff capacity as the catalyst for growth and change that can lead to new knowledge and better operational practices.