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The process map allows you to map a process by identifying the inputs and outputs of each step. It correlates the Input with the CTQ.


The process map allows you to map a process by identifying the input and outputof each step. by correlating with the CTQ, it defines the KPOV (Key Process Output Variable) and relates Input to the CTQ.

Step 1: Structuring the process

It consists of identifying each step and the chronology of the process. Typically composed of 5 to 10 steps, it is not necessary to detail the process but to identify the mesh according to the factors influencing the outputs of a process.

Some tips:

  • Follow the process and represent the as it is and not as it should be.
  • Check this reality by swapping with the teams.
  • Perform team mapping including at least one person using the process.

Step 2: Identify process output

For each step of the process, we identify the elements for measuring the performance (good or bad) of the procedure. The outputs are not the deliverables of the process but the quantifiable variables of the deliverable.

It should be noted that:

  • Each output must be accurate enough to have no misunderstanding and no interaction with another output.
  • The output of the last step of our process is the Output of the SIPOC.

Step 3: Filter Output

In order to limit the study on variables influencing customer expectations, we perform the following analysis:

  • The outputs have an influence on at least one CTQ : Define it as KPOV.
  • The outputs have no influence on a CTQ : Remove it from our study.
  • CTQ with no associated output: either the analysis is not thorough enough, an output is missing, or the analysis is not on the right process.
  • Inability to be categorical about the relationship output/CTQ : The problem lies in the definition of the CTQ. It must be deepened to change the title or cut it.

Step 4: Identify process input

Input is the input of each step of the process that generates a variation in the Output of the same process. For this:

  • For each of the KPOV, identify a minimum Input.
  • To help, use the 5M

It should be noted that:

  • The input must be accurate enough to not have any misunderstanding and have no interaction with another input.
  • It is best to identify at minima 1 Input Controllable For each of the KPOV.
  • The input of the first step is the input of the SIPOC.

Example Process Map


H. Urdhwareshe (2006) – Six Sigma: Converting real life problem in to a statistical problem

A. Subramaniam (2010) – CTQ Matrix: Identify possible Hidden factories

S. Den Boer (2006) – Six Sigma IT Management: A pocket Guide

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