## Karim Mohsen

was active active 23 hours, 7 minutes ago## Activity

Karim Mohsen started the topic I-MR or X Bar and R Control Chart? in the forum Tools & Templates 1 week ago

If I had about 30 samples obtained from one batch produced in certain time and under same condition, which is better to use I-MR chart of X bar & R chart?

And which chart should i use if i had 30 results from 30 different batches produced in several days ?

Karim Mohsen started the topic Questions re CpK and Ppk in the forum New to Lean Six Sigma 1 week, 5 days ago

what is meant by Cpk is for short term, Ppk is for long term.? And

Is Cpk tells you what the process is capable of doing in future,while Ppk tells you how the process has performed in the past?

please help to understand thisKarim Mohsen replied to the topic Shift the Mean? in the forum New to Lean Six Sigma 4 months, 1 week ago

could you please explain to me when i can use the shifting as a solution , i google it but i can’t understand

i know that i must find the causes of the variation either they are special or common causes but i also know that i may use the solution of shifting the process mean as one of the solutionscould you please clarify this

Karim Mohsen replied to the topic Shift the Mean? in the forum New to Lean Six Sigma 4 months, 1 week ago

but suppose that the results moving toward the upper spec. limit , so if i can move the specs little bit and examine the process again and gives me better CPk, isn’t this may consider a fast solution ?

Karim Mohsen started the topic Shift the Mean? in the forum New to Lean Six Sigma 4 months, 1 week ago

is one of the improvement methods in six sigma is to make shifting to the mean of the process as a first step before starting six sigma project (DMAIC)?

and if it is possible how to make this shifting?Karim Mohsen replied to the topic Control Charts in the forum Tools & Templates 4 months, 2 weeks ago

more variables like what that may impact variation than operators and machines ?

Karim Mohsen started the topic Control Charts in the forum General 4 months, 2 weeks ago

what is the difference between if the special cause appears in sample range and sample mean in control charts?

I know that it they appears in sample mean that is mean that there is problem in equipment or the operator

Karim Mohsen replied to the topic P-Value in the forum New to Lean Six Sigma 5 months, 1 week ago

@rbutler Thank you for you great effort, what a genius answer !!!!!!!!!!!

Karim Mohsen started the topic P-Value in the forum New to Lean Six Sigma 5 months, 3 weeks ago

what is the mean of the P value ? & what P stand for ? and is 0.05 reflect the confidence interval percent?

Karim Mohsen replied to the topic Box-Cox and Johnson Transformation in the forum Tools & Templates 1 year ago

Hi @rbutler ,

1-The batch is done in one blender ( a batch consists of the output of a single reactor vessel)

2- when i said that the process is normal before the modification I mean that i did the analysis of 9 batch ( 30 sample each) to examine the performance of my process before i start the six sigma project

3- all the batches i examine was…[Read more]Karim Mohsen replied to the topic Box-Cox and Johnson Transformation in the forum Tools & Templates 1 year ago

Dear @rbutler

First, I am sorry if i am bothering you with my questions but as i mentioned before I am new in six sigma and this is my first six sigma project and i need to understand more

second, let me show you what i am working on

1- i am working on flavor powder and i am measuring the chloride content of it

2- my goal is to achieve cpk…[Read more]Karim Mohsen replied to the topic Box-Cox and Johnson Transformation in the forum Tools & Templates 1 year ago

what is the optimal value of the lambda to be considered ?

Karim Mohsen and Khatri are now friends 1 year ago

why 13.9**5 ……why 5 especially is it constant factor or depends on what ?

will the process be stable by time or i need to make shifting to left or a modification to the process itself?

I did what you sent me but still the same

you said that the transformation happened to the spces and data , but i can’t found any relation between the 2 number ( i mean after and before transformation)

noted that it is the first time i deal with the transformation , so i can’t understand anything

The data in the my previous reply

but could you explain the transformation that happened ?here is the data

My specs = 13.9 – 15.9

Target 14.9Karim Mohsen replied to the topic Box-Cox and Johnson Transformation in the forum New to Lean Six Sigma 1 year ago

yes the data failed normality test P = 0.005

I want to know how to read the capability after transformation what it telling me exactly ?

Karim Mohsen replied to the topic Box-Cox and Johnson Transformation in the forum New to Lean Six Sigma 1 year ago

Sorry @rbuttler & @cseider,

i had done a mistake the two pics are the same let me show you the correct ones- Load More