The statistical thinking underlying Six Sigma is based on which of the following three principles?
A. All activities can be controlled, employee empowerment is the best control tool, and 100 percent control is possible.
B. Most business processes are subject to control, Six Sigma can totally remove variability in how processes are performed, and most defects can be eliminated.
C. All work activities can be done accurately most of the time, empowered employees are necessary for effective control, and good statistical data is an empowered employee's best control tool.
D. All work is a process, all processes have variability, and all processes create data that explains variability.
E. All work is a statistically controllable process, 100 percent control is possible, and every well-controlled process is defect-free.
Answer: D
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