Doug Coenson


  • Happy Holidays to all this season 2 years, 1 month ago

  • Yes, the power of statistics is to use RANDOM sampling to get population mean estimates and see if you can shift those estimates after process changes.  Yes, it could be the same for variation. 2 years, 1 month ago

  • It shouldn’t be any different.  There are losses to attack. 2 years, 2 months ago

  • OEE is a great tool but not easy to “measure” if loss capturing isn’t credible.

    I’ve helped many clients improve 10% output on poorly performing lines by finding either 1) easy to tackle significant loss buckets or 2) just providing instant feedback (even if just hourly) of how production is occurring so management and supervision has a chance to…[Read more]

  • Consider what you mean by target of 100%.

    Your control chart would be great if no losses were assumed and the theoretical output was included–not planned output. 2 years, 2 months ago

  • Planned shutdown times should ONLY include times where no one was employed to run the line.  Routine maintenance and operator maintenance are still losses.


    All calendar time should be included except for unscheduled run time for lack of orders or normal unscheduled time that isn’t manned.


    Your scenario would have 24 hours in the…[Read more]

  • do you have a problem statement and a metric chart(s) that the project champion agrees are measures of success? 2 years, 2 months ago

  • Have you been to any tournament lately for kids? :)    All clear up here for this bud in Dallas but let’s hope recovery goes well for those souls impacted.  I shop SOMETIMES at the Home Depot that got destroyed at Forest Ave in Dallas.  That store manager that got everyone out and closed the store deserves a med…[Read more]

  • @mike-carnell  let’s hope the Astros do well. 2 years, 2 months ago

  • I hope certification includes project completions.  If that’s the highest pareto of reason, look at the potential causes for project delay/deaths. 2 years, 2 months ago

  • @mike-carnell I had to look up the acronym.

    Maybe the safety guy ought to know that acronyms can be a source of misunderstanding leading to accidents. :) 2 years, 4 months ago

  • @[email protected]  Did you really state you’d tell the customer you wouldn’t help them out and give them a stupid phrase of “but my process is in control”.    Have you considered that something downstream of your process is impacting the product OR that variation appeared outside of your typical subgrouping that you’ve designed your control ch…[Read more]

  • I’d suggest you get to the root of why the subgroup size of sampling might change.  It sounds like they know of variation and rework may be occurring.

    a few thoughts.. 2 years, 4 months ago

  • oh my….what a silly exam question.

    Please know that there are a lot more analysis tools available and for them to mention “weaker” ones like Fishbone and 5-why (which are actually VERY related) is a shame. 2 years, 4 months ago

  • Did you have enough gap between your levels for A and B?  This (too small of change in X’s) can cause small enough difference in your Y such that you can’t get statistical confidence. 2 years, 4 months ago

  • a remote area…. was this necessary on the pareto of areas to tackle?


    IF it’s used sometimes…as hinted by your post–consider the economics and effort for removal and reinstalling. 2 years, 4 months ago

  • Have you checked this website? 2 years, 4 months ago

  • You’ll be using a different set of skill sets.

    Go for it!  Do your passion. 2 years, 4 months ago

  • I hope you mean Cpk>1.33  :)


    A pass fail test and using a sample of 8.  Just say no and convert the attribute test to a variable value test.


    Why not use SPC as designed and not do SPC on a Cpk value on 8 parts (the imprecision of the s.d. enough is to make this kind of ridiculous in my mind).  Just do SPC as designed and work to raise th…[Read more]

  • See if you can get some “credible” projections on energy savings from the high speed door closer vendor rep and then use a subset of @venerablebede ‘s analysis.

    This may save some work but of course @venerablebede full technique will work. 2 years, 4 months ago

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