great info and presentation, very well summarized! thanks, as an engineer with couple years experience in manufacturing and a masters I was confused as to whether to go for the Green Belt or CQE. I have decided to take the Green Belt first.
That's odd, let me go in and double check that - you should have Rev B. If you're on my email list, hit reply to one of those emails and I'll send over the latest revision.
Cycle time must be measured. Get a stopwatch, and observe each step in your process and take repeated measurements of that process to estimate the average cycle time.
The Green Belt Certification is the actual exam you have to pass to become a certified green belt. The E-learning is an online course to help you prepare for that exam.
Best ANOVA explanation in YT!!! Love how you repeated key concept again and again, now its completely clarified from the confusion i got before watching.
Hey mate, I have certain independent values(Laying speed, force, Torque, acceleration and deceleration). I want to do an DoE. Now these are the process parameters of the machine, which has 16 heads. These 16 heads can be controlled simultaneous. Id like to use 3 of them and test the parameters on each of them. Besides that, the tape may vary aswell, since it can be wider or thicker and it's up to the producer. How do I setup my DoE Plan?
You really changed my prospect toward biostatistics ( MD. by the way ), getting my Masters in Clinical Research. I really enjoyed it , believe me. Thank you. Really!!
There’s something to be said for seeing it all broken down. It’s my pet peeve when someone treats a stats tool like a black box then ties their colours to the mast without appreciation of all the out falls and inner workings. Great video, I’ve often wondered how to cross validate duplicate tool performance correctly and now I know.
If you are looking to reject or accept product against a tolerance what range of parts should I choose for my study? Spread the tolerance or spread over the known historical process variation? I’ve been told tolerance but as the process is capable I need to misprocess to generate the arts that cover the tolerance.
It depends on which analysis method you choose! If you're going to use the % of Process Variation metric, then having parts that span your entire process range is a must!
@@greenbeltacademy shouldn’t I be using the tolerance % for inspection? If it depends then on what grounds so you not have to have parts that span the spec?
@@moosemoss2645 great question, I think in a perfect world, you'd attempt to have parts that span both the design tolerance and the known historical process variation. Also, yes, if you're using the gauge for conformance (product control) then yes getting parts that span the design tolerance is important to demonstrate that your precision is acceptable across the entire design tolerance.
@@greenbeltacademy thanks. Part of me doesn’t doubt that measuring over the design tolerance is the correct way but on the other hand if you have to misprocess to make the parts to fill this spread then use the historical deviation in your calcs it feels kind of strange.
Because when adding up variance (in standard deviation) we don't simply add the percentages, we must convert them to variance first, then add them up. Also, the total percentages do not add up to 100% for this same reason.
The data doesn't "prove it," but rather, suggests it... because a Type One error is still possible. That's why we say reject the null hypothesis and not disprove the null hypothesis. The reject/fail-to-reject language points to the difference between proof and evidence. But still... a very nice video!
I still cannot understand the AV calculation; why d2=1.912? If the subgroup size=3, the number of combinations of parts and operators (g) = 10 parts and 3 Operators = 10*3=30. Based on the d2 table, we can know that the d2=1.693 instead of 1.192. Can you explain why d2=1.192 in detail in your case study?
Great question - and that's a tricky part of the whole process, so in that reproducibility calculation we use n = 10 because that sample size is used as an adjustment factor to essentially eliminate EV from the AV calculation. However when using the table to look up the d2 factor for AV you use a different perspective.
@@kungfuball98 If you're talking about the Study Guide, they just updated it and I haven't gone through it to truly give it a good evaluation, so unfortunately I'm not sure.
Hey Frank, that sounds hypothetical, and I've never seen that before. Technically, if the EV is large the operator range will reflect/capture/include that variation (hence the subtraction), and operators tend to create variation in a measurement system, so I've never seen AV turn into a negative number. A negative number is impossible, you can't have negative variation.
Great videos! The question I've had, you've had clear, concise answers to! I'm deciding between yellow or green belt certification (depending on my personal circumstances). I'm considering purchasing the asq handbooks. If I get the green belt handbook, is it really necessary to also get the yellow since the BoK overlaps? Just wondering if I'd be missing anything if I got the green belt book but took the yellow belt exam.
