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@@wy4776 Thank you for your kind words. This video (animation) was made on PowerPoint.

Thank you so much !

Thank you for subscribing ! Well, the ppt is in bits and pieces. I've somehow merged together those slides and some other stuffs into this video. And trust me, the ppt or those slides are of no use.

@@think_lean how can I contact you? Can I get your email or WhatsApp number?

Thank you so much for your comment. Allow me to address your query. Sigma Population with denominator ‘n’ is used when we’ve data of the entire population (duh). Also, when we only want to quantify the variation in that particular set of data and we don’t want to extrapolate the data for predicting the process behavior. This is rarely a case with us engineers. Our goal is often to predict process behavior using a smaller sample. (Even if we collect data for an entire batch, it effectively represents a sample set of all parts produced or yet to be produced. I hope it makes sense). In sampling method, we use ‘n-1’ as denominator, so that the resulting value of standard deviation will become slightly higher and this ‘higher value’ is now our best guess for the value of standard deviation in the overall population. This is known as Bessel’s correction. (Now, you can ask me why n-1 and why not n-2 or n-3. To be honest, I do not know.) Finally, in my opinion, the R-bar/D2 method is a user-friendly way of calculating standard deviation, especially in Control Charts to spare operators from complex math during chart plotting. I hope it helps.🙂

@@think_lean good explanation and great video

Thank you for your comment, Steve. If you were referring to processing losses as Change Over losses, you’re absolutely correct. I intentionally omitted that aspect in this series, fearing that it would make things too complicated. However, I’m currently working on a separate series dedicated to reducing changeover time. It’s called SMED (Single-Minute Exchange of Die). You can find more information about it here. ruclips.net/video/8A2T_JMA03M/видео.html Again, your comment brings me immense joy-it’s heartening to see people who question and seek beyond the status quo rather than merely accepting what’s taught to them.”

Thanks for liking

Glad you like them!

I'm so glad to hear that. Thank you

Rbar / D2 is an easier way to estimate the value of Sigma (standard variation), where D2 is a function of n (sample size). I've deliberately skipped this formula since it may become pretty difficult to explain D2 which is a result of extremely difficult mathematical calculations. Just remember, as the sample size increases, the value of D2 increases and the value of standard deviation decreases for the same Rbar. That means with bigger sample size we can have better estimate of Standard Deviation. Coming back to your point, whether you calculate Sigma with Rbar/D2 or using the standard formula, your result will be the same. or most likely to be the same :)

It's my pleasure.

Thank you so much for your comment ☺️

Dear mischapeters5204, thank you for your comment. And yes, technically you're correct. Probability → prediction (future) Likelihood → assessing (past/present) But will it be inappropriate to say that, "Probability measures the 'likelihood' of a future event based on available information."? Or can you help me find an alternate word (in place of likelihood) so that less experienced people who are new to SPC can also understand what I want to say 🙏.

@@think_lean No, it is certainly not inappropriate, someone who is well versed in the definitions underlying probability and likelihood will understand what you mean. My point is more that you are trying to appeal to an audience that is less familiar with these terms and then you would do better to be strict. I think it would be better to say the following: Probability, in a broader sense, is the chance that something will happen, in this case, because it can also relate to the past.

@@mischapeters5204 Thank you for correcting me. I think 'chance' is better word than 'likelihood' in this particular case.

You are correct. I didn't noticed that while making the video.. Thanks for pointing it out.

I think you missed the earlier lessons in this series. Perhaps going through this playlist will help you get the answer you're looking for. ruclips.net/p/PLw2beuYPUpb3dk2j1oOBnqD40hc0Zy7NL&feature=shared

100% 😊

You're welcome!

Glad to hear that! Thank you for your comment.

Think of Cp (Process Capability) as a measurement unit to identify if the process qualifies to make the product. If it doesn't, it's normally an engineer's job to 'IMPROVE' the process by modifying the machine, using different tools/dies or reducing the clearance between moving parts, etc. Once the Cp is qualified, then in the next step Cpk (the process index) is a measurement unit to identify if a process is set at the mean position. If it isn't, like the diameter is on the higher side or the length is on the lower side, then it's normally an operator's job to 'ADJUST' some machine's setting and bring it back to the mean position. Hope I'm able to answer; if you're asking something else, please elaborate a little. For example, what exactly is not clear? -Amit Gupta

Thank You for your support. Much appreciated 😊

Value Stream Mapping, Coming soon...

I'm so glad you liked it .

Thank you for your comment. Please go through the Control Chart part 2 for detailed explanation on calculation of mean, UCL & LCL. ruclips.net/video/i8fwSrb2zNQ/видео.html. I hope this helps.

@@think_leandude u just got me a B on my final. Fricking THANK YOUUUU! I was so gonna fail it lol

I'm so glad to help. More lessons will come.

Happy to help

Yes, you can. As a matter of fact, this is why I made these lessons. To create awareness.

My pleasure, Sir.