What are the four stages of Deming's PDCA model?
a. Practice, Do, Check, Analyze
b. Prepare, Define, Calculate, Act
c. Plan, Do, Check, Act
d. Prepare, Define, Check, Analyze
a. Practice, Do, Check, Analyze
b. Prepare, Define, Calculate, Act
c. Plan, Do, Check, Act
d. Prepare, Define, Check, Analyze