**Question:** All are steps used in Six-sigma except -

A. Define the problem (DMAIC)
B. Define the solution (DMADV)
C. Define the process (DMPIAC)
D. Define the customer (DMCIAD)

**Core Concept:**
Six Sigma is a business strategy and methodology used to improve the quality of processes or products by identifying and removing the causes of defects (errors) and minimizing variability in manufacturing and business processes. The acronym DMAIC represents the key steps in this methodology: Define, Measure, Analyze, Improve, and Control.

**Why the Correct Answer is Right:**
The correct answer, C. Define the process (DMPIAC), is incorrect because it does not align with the core steps of the Six Sigma methodology. In the DMAIC process, defining the process (DMPIAC) is not part of the initial "Define" phase. Instead, defining the process falls under the "Measure" phase, where the process is analyzed to determine its current state and performance.

**Why Each Wrong Option is Incorrect:**
A. Define the problem (DMAIC) - This is the correct step in the "Define" phase, as it involves identifying and understanding the root cause of the problem.
B. Define the solution (DMADV) - This step belongs to the "Design for Six Sigma" methodology (DMAIC), not the main Six Sigma process itself.
D. Define the customer (DMCIAD) - While defining the customer is important in Six Sigma, it is not part of the initial "Define" phase but rather falls within the "Measure" phase, where understanding the customer's requirements and expectations is crucial.

**Clinical Pearl:**
Understanding the Six Sigma methodology is essential for improving quality in healthcare and business processes. The DMAIC process helps organizations identify, quantify, and eliminate defects, resulting in increased efficiency, effectiveness, and customer satisfaction. Always ensure that you are familiar with the correct Six Sigma steps to apply them appropriately in your work setting.