*[https://www.principles.com/principles/ae60e8d3-d3d3-4ed4-b243-826d758a2be6/ Use the following "drill-down" technique to gain an 80/20 understanding of a department or sub-department that is having problems.]</ref> | *[https://www.principles.com/principles/ae60e8d3-d3d3-4ed4-b243-826d758a2be6/ Use the following "drill-down" technique to gain an 80/20 understanding of a department or sub-department that is having problems.]</ref> |