Pareto charts. A large hospital was concerned about whether it was scheduling its operating rooms efficiently. Operating rooms lying idle may mean loss of potential revenue. Of particular interest was when and for how long the first operation of the day was performed. As a first step in understanding the use of its operating rooms, data were collected on what medical specialties were the first to use one of the rooms for an operation in the morning.5 Here is what the hospital found:
What percent of total operations do these 8 specialties account for? Make a Pareto chart of percent of all operations by specialty. Which specialties should the hospital study first when attempting to understand operating-room use?
Q7;
Special causes. Tayler participates in 10-kilometer races. She regularly runs 15 kilometers over the same course in training. Her time varies a bit from day to day but is generally stable. Give several examples of special causes that might raise Tayler's time on a particular day.