# Calculation of PPM & Sigma Level in an Excel Spreadsheet

#### vikash

##### Registered
Dear sir
I want to know that my calculation in excel sheet is right or wrong, if not please help with example

with regard
vikash Kumar

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#### Stijloor

Super Moderator
A Quick Bump!

Can someone help?

Thank you very much!

Stijloor.

#### Jim Wynne

Dear sir
I want to know that my calculation in excel sheet is right or wrong, if not please help with example

with regard
vikash Kumar
That's a very busy spreadsheet, and there are lots of abbreviations and references that can't be resolved. If you could perhaps extract a single example and show us your formulae it would be easier to help you.

A

Why is the date line 26 blank? If you wish to keep blank lines then your formulas need to trap anticipated errors due to missing data. This will avoid the #DIV/0! and #NUM! errors.

Why are cells AI6 and AI7 using vk4 vs vk9 as the rest of the cells in the AI column?

Column AK is trying to calculate a rolling 6 sigma level. Rejects are not a normal function since it is lower bounded by zero. Also, there are no specifications for rejects, therefore, no Cpk or 6 sigma level can be calculated. Therefore, column AK is not providing any information of value. Just eliminate it.

Hope this helps.

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