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Assessing Process Capability When the Data are Non-normal

LEAN SIX SIGMA WORLD CONFERENCE ABSTRACT

Assessing Process Capability When the Data are Non-Normal

Presenter:	Dr. Scott Kowalski, Senior Technical Trainer, Minitab, Inc., Sanford, FL, USA
Keywords:	Process Capability, Nonnormal Data, Case Study
Industry:	Manufacturing
Level:	Intermediate

Process capability measures, such as Cpk, Ppk and tolerance intervals, typically assume that your data follow a normal distribution. But what should you do when your data fail the test of normality? There are many reasons for non-normal data. However, one of the most common reasons is that the data are naturally skewed due to a physical bound on the data or when extreme values tend to occur in only one tail of the data distribution. Case studies will be used to facilitate strategies for assessing process capability that you can successfully apply to your own data that are not normally distributed.

Following the presentation, you will be empowered to implement successful strategies for assessing process capability when the normality test fails:

Transform data to use capability statistics that assume a normal distribution.
Choose an appropriate distribution to model data that are non-normal.

Call for Proposals

Proposal Submission Deadline:
October 11, 2019

Acceptance notification date:
November 11, 2019

Early Registration Deadline:
February 11, 2020

Please make sure to review and prepare the material needed before you start the on-line Proposal Submission Form. Click here to see Proposal Submission Guidelines.

Who May Submit: This online form may be used by a principal speaker, co-speaker, contact person, or a committee member submitting on behalf of a speaker.

Multiple Proposals: You may submit multiple proposals.

Conference Registration Fee:
The conference registration fee is waived for the principal speaker of accepted proposals. Speakers are responsible for their travel expenses and arrangements. Co-speakers will receive a 30% discount for the conference that they are presenting at.

Length of Presentations: Technical sessions are typically 35 minutes. There will be a limited number of "double" sessions, 70 minutes, at the end of each day.