3. (15 points) The following data were collected for CT (computerized tomography) Scanners at a medical imaging department over 10 days. The number of scans completed is 90 per day (medical imaging operates 24/7). "Defectives" are considered to be mis-scans, wrong set-up, etc. After a maintenance improvement project, it was decided to make a daily planned stop of 2 hours to carry out preventive maintenance tasks. After 10 more working days, the following data were collected. How has the OEE changed before vs. after? Was the project worthwhile? Why or why not