SPC - xbar and s chart Example by Hand

[@coxpoppyable]

Thank you, this is very helpful for me. I was asked to recreate an X bar S chart in Tableau and most resources I could find online were going over my head because i didn't come from a STEM background. This finally helped the concepts click for me. Thank you!

[@haroldsimpson8422]

This was explained very well as a Senior Engineer I have done several calculations like this by hand; as I always want to be able to explain to my manufacturing personnel what the application of the problem is telling me, I find doing it manually really keeps one sharp. Again Kudos to your thorough explanation.

[@user-xt6ss7pu6v]

Wow! This was really straight forward and easy to understand. A huge help. Thanks.

[@CADable]

Very Useful Information! Thanks for sharing.

[@johnontita6845]

good explanation,thanks

[@nardina1454]

When you were calculating S chart how did u get the lower and the upper limits value

[@maryamintasab8948]

what if we want to calculate xbar and s chart with 2 sigma and 1 sigma?

[@muhamadfirdaus8400]

thanks for saving me :)

[@jesusguido6986]

What about if my subgroup size varies from n=8 to n=35?

[@uzaerurrahman6704]

Very resourceful. Can you please upload An table!

[@aboalinoona9211]

hi thanks for this nice presentation please i need to know how can i use regression with capability i mean what dos y mean thanks

[@jann85]

which book did you use it for equation?

[@salehibrahim7482]

Thanks for your explanation, but! According to the book, X bar has 10 subgroup and more. However, R bar has 9 subgroup and less.

[@garcas89]

how do you calculate S value? I tried to use the formula that you provided but when I calculate the result are not the same

[@stephenkamau7166]

Sure the results are not the same given other values

[@akshaymane2848]

Thank you

[@chandan12342]

Thank you mam

[@steinbeck95]

From where are you getting the A_n from?

[@aliffirdaus2593]

Table factor

[@muhammadnazhansyahmi4982]

Life Saver HAHAHA ! or future saver hahaha

[@ankitjain3170]

Ma'am plz make a video for attribute data chart as (u chart,p chart.np chart,p chart.

[@amardave_katha]

Mam please upload video on msa gauge r and r

[@bigibo7665]

I like you

[@nadzsmith5657]

Why did you divide by 3 and not 4?

[@rooster8355]

form the formular si = root Σ( xi - xbar )power2 divide by n-1

[@samsulamri2914]

I think is must divide of 4. Because the total m

[@mdfgfb34]

Yes it should be decided by n not n-1

[@mdsafwankhan1711]

In practice, if you were to use n instead of n-1 in the denominator, you would underestimate the population standard deviation. Bessel's correction helps ensure that the sample standard deviation is an unbiased and more accurate estimate of the population standard deviation, especially for small samples. For large sample sizes, the difference between using n and n-1 becomes negligible.

[@mdfgfb34]

Thanks mam