Can some one help with DMADV road map and the tools used in each phase?

Thanks

Madhan

Since nobody is answering my queries for quite long time. I am not being part of this blog.

Thanks All

Madhan

Hi Madan,

This is nothing like being a part of group or not, as you understand people spend most of their time in doing their daily jobs, which is of first priority. If i will talk about myself, I login maybe once a week or once a forth night.

I will try to explain the DOE with an overview of a typical DOE process. As with any task, the DOE process starts with proper planning.

Planning: You need to define purpose of your experiment (e.g., minimize casting porosity). You will need to identify your response variable (response variable = output variable = the "Y" in Y=f(X)), and analyze your measurement system to make sure that your measurement system is capable of detecting differences in your response. Before you start to experiment, you will also have to understand the state of control of your process. Is the process under control? Is it stable? (not necessarily a requirement - sometimes you will experiment with the objective of getting the process back in control)

Screening: The purpose of the screening phase is to identify the input variables (input variable = factor = the "X's" in Y=f(X)) that "change" the response variable. First, you will need to find all of your "Potential X's".

The next step in screening is to select an experimental design. We need to choose appropriate factor level settings (factor level settings are the values that we will assign to our experimental input variables - e.g., balance spindle rotational speed High/Low = 2400rpm/3600rpm). Finally, we will perform a series of experiments to determine our significant inputs.

Finally, we will take our significant inputs into the optimization phase. We will choose an optimization strategy (depending upon our objective, our past history of the process, and the number of significant input variables), and optimize our response. Of course, before making expensive changes or time consuming change-overs, we will validate our findings in a production setting.

Enabling Concepts:

DoF Strategy Repetitions vs. Replicates

Signal to Noise Ratio Interactions

Alias Structure / Confounding

Hope this will clarify some of your doubts.

Wbr,

Sujeet Singh