The document discusses challenges to the assumption that improving quality of care automatically means hiring more staff. It examines three common assumptions: 1) Quality is determined solely by staff levels, 2) Staff are already 100% efficient, 3) Roles cannot be changed. The document advocates using tools to understand variation in patient needs over time and removing non-essential tasks to increase direct care time. It provides two examples where multi-disciplinary teams achieved improved outcomes by focusing on required skills rather than rigid roles and increasing role flexibility.