ection 2. CASE STUDY - SAND CORE Pitt Company manufactures castings for the aerospace industry. These castings are for fuel systems and other critical parts used in commercial and military aircraft. The company makes castings starting with sand cores, which are produced on two shifts using four different workstations (a workstation includes a machine and operator). Management is concerned with the current performance levels of the sand core making department. Existing quality inspection data show that their scrap rate is much higher than their goal of less than 5% per work period (work period = one shift of production from a single day and a single operator. Work period represents a 'row' in the attached Excel file) Some downstream inspectors believe that the quality of cores is dependent on the operator that makes the core. Others believe that not all workstations (i.e., equipment) are set up the same, resulting in excess variation and scrap. Of note, operators typically use the same workstation for their shift. However, if an employee is absent, another operator may be used temporarily. A Six Sigma team is formed to study the sand core department and identify opportunities to reduce the scrap rate. Scrap data are