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  • @girishbhoir There is no such thing people seem to get upset if you refer to it as foolproofing. The PC term is mistakeproofing. Regardless of what you do it will not be mistakeproof but it can be made more difficult.

    With regards to your question – gravity feed racks.

    Just my opinion.

  • Neil T Try this. Spend some time with OC curves and the Poison distribution.

  • @rbutler Thanks for jumping in. I was interested in what you thought about this.


  • @becky7516 If you really want consensus which I have no idea why you would then you have a problem since you have a couple yes’s and a no. Ask yourself what are the import things that need to be accomplished by a continuous improvement person and then ask yourself how a degree satisfies what needs to be done.

    Personally I could care less about a…[Read more]

  • @GraemeHenderson I am with Robert Butler on the backing up a bit but maybe a bit further than Robert suggested. You said “I have been tasked with producing control charts for some of my org’s KPIs.”. Ok so if they tasked you to do a control chart why did they ask you to do that specifically? If you are the expert and you haven’t figured it out…[Read more]

  • I wouldn’t waste time on calculating control limits with Xbar charts. Just plot daily averages and treat as a run chart and see how the process is trending.

    Control limits are only useful if you want to improve the process or react instantly to get a process back under control. My two cents.

  • I’ve had plenty of successful people go through either GB or BB training/certification who weren’t college graduates and they were fantastic.

  • GH, I’m just saying SPC is a way to keep a process under control and drive process improvements. Management updates monthly are fine.

    I’d think you’d get more value in plotting mean values of those not meeting the system requirements or just plot how the average of all are trending. One can get 100% defective and all be only one day above the…[Read more]

  • Unless you’re taking action immediately when a point goes “out of control” on the control charts, they’re just process monitoring charts which is fine.

    SPC is wallpaper unless actions by those inputting the out of control points on the charts are empowered to make action to alter the next results.

  • A part of good lean six sigma projects is getting project sponsors and making sure projects are aligned with the business.

    Also, check out the website on DPMO conversion to sigma level.

  • Nice attachment @rbutler . I would have done box plots to help emphasize the same message–we all have our “pet tools”. :)

  • Hard to analyze the data without the demographic information such as month/year or other things going on (e.g. X’s to correlate with). Is the precipitation all rain or a combination of snow/rain totals?

    Just some ideas for you to consider in your analysis.

  • @fabio71 You are correct. I was referring to the 8D. I do have an issue with the 8D process in general. I was trained in it at a major auto manufacturer in the US who was my largest customer. First module “what is 8 Discipline Problem Solving.” They immediately told us it was for improvement and not used as a punitive measure. If you are in the…[Read more]

  • @cseider Correction to the last post. Each macine has 80 hrs per week not 40.

  • @cseider Just as a point of reference I run 2 10hr shifts 4 days a week in my factory. Every machine has 40 hrs of potential run time per week. It doesn’t matter what the reason we are not producing parts (none of the planned vs unplanned DT) it affects the OEE. Quality is affected, frequently, by the condition of the molds which I do not own, so…[Read more]

  • @mike-carnell

    I expect joshing from those around me…it’s not like I don’t give “feedback” even if I’m soft pedaling or peddling LOL

    @ahtan993 I don’t know anything about the site but you’ll note that’s part of the problem as stated early in this chain–you don’t have a theoretical rate. And no–don’t fall into the trap (although maybe it’s…[Read more]

  • @yogeshibs Thank you

    @alexyves This is just a suggestion. Everybody likes to make the comment “Think outside the box” but they can rarely give any idea how to do that. One way to force yourself outside the box is to take a set of data like you have and without trying to reason the relationships you sit down and start making charts. Don’t even…[Read more]

  • @JBRGuy The ratio between the two std dev tells you that the short term and long term are equal (if it is equal to one – no idea where the 0.8 comes from). That means that you aren’t seeing any additional variation between long term and short term so you would have an equal amount of variation between the two. To do that it would have to be under…[Read more]

  • @cseider “soft peddling”!!!! You were always the kinder gentler version of the company. You would have been a really bad pirate (love Black Sails captain Vane is my new data point for a total bad*ss).

    It is a style that does work well for you. Just messing with you a bit.

  • @JRBGuy Agree on the charts for stability as long as you don’t take that position that a process can’t be improved until it is under control

    @augsutosacramento I have done something similar to your CR but not exactly. First if you are relying on a pure ratio of std dev there is a gaping hole in the logic. If you have such a large std dev that…[Read more]

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