This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
all are Steps used in Six-sigma except - 
Select and explain. 
A. Define, B. Analyze, C. Improve, D. Feed back
D: Feed back
Answer: D: Feed back 
Explanation: Ans- "D" Feed backSix Sigma requires five steps for quality improvement?Define -+ Define the problem, clarify and relate it to the custmer. Who are the patient's, and what they want? What are the objectives?Measure - Measure your target metric and know your measure is good. What will improvement look line? On what data will our effect measured.Analyze -+ Look for root cause and generate a prioritized listing of them - collect data and analyze using proven tools.Improve - Determine and confirm the optimal solution - Implement modification to improve the process.Control - Be sure the problem does not come back and sustain it Monitor performance to maintain improvement. Popular outcomes from Six - Sigma Increased patient satisfaction and care, Fewer complaints, Increased prescription, accuracy, Reduced waiting time and variation, Safer and more efficient emergency services, Fewer medical errors defects, Increased physician satisfaction.