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  • Are you paying attention to your iSixSigma User Profile rankings? Get your ranking higher like two community members have in the past month.

    We offer our thanks and congratulations to them for being a part of […]

  • Chris Seider replied to the topic FMEA in the forum Methodology 1 day, 13 hours ago

    You can have more than one effect and branch out your FMEA like a tree. Another effect of a flat tire is financial impact of the repair and stress might be a third. You can have various effects from one defect mode. Some might combine the stress and lateness in one effect and therefore give a different severity than just…[Read more]

  • I would think that you would absolutely want to use the parts that the gage will be measuring. If I’m using a pair of calipers to measue the OD of a key way (with spec limits of .00125″ – .00127″, I don’t care if the calipers will detect a body length that has specs of 1.25″ +/- .05″.

    To get a good part to part variation needed, simply get a…[Read more]

  • I hope Charlie is measuring parts that his process typically produces 0.5 – 1.5 inch items.

    No need to use standardized items….one can easily sample across a process and get process variation.

  • Finally looked at your file.

    You need to calculate confidence intervals for the mean and standard deviation and reread my above posting. I haven’t used excel to get those…I don’t do it by hand anymore and use Minitab.

  • Chris Seider replied to the topic Process Map in the forum General 1 day, 20 hours ago

    Whatever the team wants and move on….the goal isn’t a “pretty” process map but solving the issues of the organization.

  • Chris Seider replied to the topic FMEA in the forum Methodology 2 days, 19 hours ago

    The severity of the effect would be the same with the following caveats:

    1. If it’s the same effect of the same failure mode in the same position of the process (position includes timing) UNLESS

    2. If the failure mode was loosely written (e.g. too high of ph) then you could have the different severity but then I’d recommend stating something…[Read more]

  • If you’re trying to compare variances of the gage, in the case you described, I’d say you need to gather more readings per sample but check the Power and Sample Size for 2 variance test in Minitab.

  • Well thought out document. I think readability would be improved with spacing between paragraphs. :)

  • Simply stated….not all projects are cost savings. Some are alignment with other business objectives. GB/BB projects ought to be aligned with business objectives and that’s what Project Champions role is primarily besides barrier bust when projects get bogged down.

  • When doing a GR&R, you are not wanting to see if your process is making good parts. You want to make sure that your selected gage is capable of distinguishing between a good part and bad part. You want to show that your gage is capable of detecting a bad part. If you have no part variation during the GR&R you will not be able to verify that…[Read more]

  • Katie Barry replied to the topic New to Lean! in the forum Training 1 week, 1 day ago

    @LeanElliot You might want to take a look at our Lean Six Sigma E-learning Providers list:

    Our Marketplace also offers some online training options:

  • I was waiting for a colleague or two reply…but your request is silly if I understand it.
    Just use excel or Minitab to generate some data. I doubt you’ll get many volunteers to give out process data from their organizations.

    However, you could always see if you could network with a bank branch manager and volunteer to gather data for a week…[Read more]

  • To Case,

    One can’t make that assumption…one should check the options to see what’s selected for each user. However, it’s a minor enough point in the whole DMAIC methodology.

  • As announced in the Democrat & Chronicle today, Xerox is cutting its formal Lean Six Sigma program (“Xerox cutting back on Lean Six Sigma program, jobs“).

    According to the president of corporate operations […]

  • Remember what the formula is for Ppk. You can always use the minimum mean for the confidence interval and the maximum standard deviation for the confidence interval desired. That will give you your lower CI for Ppk. Do a similar way for the upper CI for Ppk.

  • The calculations of control limits uses a different estimation of the standard deviation than the standard deviation calculated by hand (or Excel function). This is to reflect that the sample size is usually small and therefor an estimation of long term variability is needed. Shewhart’s Table of Constants was developed to account for the…[Read more]

  • I’d say address the team’s root causes for the major defect and gather more data afterward to see if the problem left the process.

    I know it’s not a popular question but did you do an attribute gage R&R? How good is your data about whether the defect really existed. Maybe the “measurement system” is throwing away good items as bad ones….NOT…[Read more]

  • Kind of hard to comment when the data isn’t supplied or numbers given. Anyways, there are various settings and assumptions so you’re probably correct.

  • Consider getting 30 samples from product already produced. This will give you a good idea of “actuality” of pre-control being executed.

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