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Process Capability Studies

Process capability studies tells you how well your process or product meets specifications. Process capability baseline numbers predicts current and future defects for any given measurement characteristic.

The term for process capability is CpK.

Introduction to Data Analysis

Training Video (Created by Quality Assurance Solutions)



Data Analysis is key to making business decisions about your process or product. To improve the process or product you have to measure it. Once you have the measurements, you need to quickly interpret the data.

This hour long video will show you how to present the data to management and others. Normally, management is not interested in the raw data. Business decisions are based on the summarized data or graphs of the data.

This course provides the basic tools for understanding, summarizing, creating graphs, and making future yield predictions with your collected data.

You will learn about

  • the types of data
  • basic statistics such as averages and variation
  • creating and interpreting histograms
  • normal distribution
  • process capability studies
  • predicting yields
  • the relationship between process improvement and data
  • pareto charts

In addition you will learn how to use Microsoft Excel to conduct the data analysis. A final spreadsheet is provided for your review.

Your Satisfaction is Guaranteed.

Within 30 days, if you are not satisfied with 8D Manager, I will refund your money.

Price $49.95

Click here to buy Introduction to Data Analysis






CpK Guidelines


CpK Calculation elements

Easy to calculate process capability if you have these 3 items:

CpK Equation

Lower number of the 2 below equations

(High Specification – Data mean) / (3*standard deviation)

or

(Data mean – Lower Specification) / (3*standard deviation)



CpK Interpretation

  • The closer the data average is to the nominal specification, the higher the Cpk.
  • The smaller the standard deviation, the higher the CpK
  • The closer the average is to the upper or lower specification the lower the CpK

Process capability and defects.

Definition of a defect: When a part is beyond the specification, the part is consider a defect.

See the below table for calculation of defects per million parts after calculating the CpK.





Process capability studies are a basic tool of process improvement.
If you are interested in seeing a demo for the best enterprise software for conducting real time SPC, histograms, pareto charts and capability studies please fill in the below form.

Request for SPC Demo
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Quality Assurance Solutions
Robert Broughton
(805) 200-7979
USA
email


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