1. Measuring for improvement: from Toyota to thoracic surgery
James M Levett, MD, Raymond G Carey, PhD 
The Annals of Thoracic Surgery 
Volume 68, Issue 2, Pages (August 1999)
DOI: /S (99)

2. Fig 1
Histogram of average coronary artery bypass grafting (CABG) mortality before and after implementation of new protocol. Was the new protocol effective in reducing deaths?
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
Control chart of coronary artery bypass grafting (CABG) mortality before and after new protocol. CL = center line or mean; LCL = lower central limit; UCL = upper control limit.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Histogram of decrease in average intensive care unit (ICU) admission time after the 1997 implementation plan, hospitals A and B. Was the decrease due to the implementation plan?
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

5. Fig 4
Control chart of intensive care unit (ICU) admission time, hospital A.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

6. Fig 5
Control chart of intensive care unit (ICU) admission time, hospital B.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

7. Fig 6 Basic elements of a control chart.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

8. Fig 7
Control chart of first/elective coronary artery bypass grafting (CABG) mortality (DRG 106 and 107).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

9. Fig 8
Control chart of first/elective coronary artery bypass grafting (CABG) complications.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

10. Fig 9
Control chart of bowel operation length of stay (LOS) (ages 18 to 64).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

11. Fig 10 Control chart of complications from bowel operation.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )