Karim Mohsen


  • The data in the my previous reply
    but could you explain the transformation that happened ? 3 years, 8 months ago

  • here is the data
    My specs = 13.9 – 15.9
    Target 14.9 3 years, 8 months ago

  • @cseider

    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 ? 3 years, 8 months ago

  • Sorry @rbuttler & @cseider,
    i had done a mistake the two pics are the same let me show you the correct ones 3 years, 8 months ago

  • @cseider

    the first pic after transformation and the second pic before transformation 3 years, 8 months ago

  • the second one 3 years, 8 months ago

  • what i can understand from the two pics 3 years, 8 months ago

  • I want to understand the difference between the box-cox and Johnson transformation

    and what they do if i apply any one of them to the capability analysis ? 3 years, 8 months ago

  • @rbutler
    Hi Robert,
    could you please tell me the different between 1 sample Z & 1 sample t ? 3 years, 8 months ago

  • here it is the plot of the data 3 years, 8 months ago

  • Hello Robert,

    Thanks for your reply and let me share with you some of my data information

    1- my sample size is 30 samples
    2- all my data i have got is within the specification limit 14.9 +/- 1
    3- I put my data in the control chart I-MR chart to check if there is any special causes or not and the result is that there is no any special causes
    4-…[Read more]

  • Profile picture of Karim Mohsen and are now friends 3 years, 8 months ago

  • Hi,

    I am new in six sigma and i need your help,

    i have a data of a process when i test its capability i found the cpk = 1.01 but when i test its normality i found the P-value = 0.04
    is this reasonable? and is there a relation between the CPK and the normality of the process?
    And how do i have good CPK while the process is not normal? 3…[Read more]

  • Karim Mohsen became a registered member 3 years, 8 months ago