iSixSigma

Six Sigma DMAIC…

Six Sigma – iSixSigma Forums Old Forums General Six Sigma DMAIC…

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • #27190

    Seans
    Member

    In Six Sigma Methodology ie DMAIC, I felt that Analyze Phase is the most critical. A correct data collection means everything ! But, how sure we are to say that the data collected for analysis really represent the actual process? What is the standard way of collecting appropriate data and sampling plan since every Black Belt Projects defer significantly in their nature?

    0
    #66320

    Cannizzo
    Participant

    I think control is the most important, because if you don’t maintain the benefits of the process improvement what good was the work?

    0
    #66322

    Ajit Appari
    Participant

    DMAIC : which step is most critical? well every step is most critical here. What Sean and Carol are saying seems to me their reflection of what they have accomlished in their 6 sigma projects.

    Sean : data collection si defintely very important and there is always a risk of data not representing the actual system, and that is why the statistical analysis depends on 2 types of error : whihc are refered as ALPHA and BETA error or in otehr words TYPE-I and TYPE-II error. These errors reflects the possibility of accepting a hypothesis while it si false and rejecting a hypothesis while it is true.

    This philospohy has to be considered even when we collect data and analyse for a system.

    Carol: control is again very critical, and I agree with u that, if we can;t sustain the improvements gained, then its of no use. But a control process works properly, only if the data being collected is fairly accurate. If the data is not correct then improvements can;t be sustained.

    0
    #66325

    Marc Richarsdon
    Participant

    Personally, I favor some type of control chart. It gives you a clearer picture of the process central tendency and variation over time.

    0
    #66337

    Stephens
    Participant

    Come on….standard way….differ significantly. Certainly there are difference from Black Belt project to BB Project, but the process is pretty standard. There is never a way to know for sure that the data is a “true” reflection of the process, but we knew that going in…there is varition in everything! So we do what we can. Test the variability of the measurement system. Write good operational definitions. Gather data in rational subgroups and measure the variation over time. The data analysis within DMAIC is important, but so it the process analysis. Working together they allow us to collect data and use statistical tools to look for statistically significant differences. We take our finding and process to Improve to apply a creative solution that will allow us to reduce or eliminate this difference. Oh the fun and joy of it all!

    0
Viewing 5 posts - 1 through 5 (of 5 total)

The forum ‘General’ is closed to new topics and replies.