ComplianceOnline

Process Capability Analysis, and What to Do if it's Not a Bell Curve

Instructor: William Levinson
Product ID: 705157
Training Level: Intermediate
  • Duration: 60 Min

recorded version

$229.00
1x Person - Unlimited viewing for 6 Months
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Recorded Link and Ref. material will be available in My CO Section
Last Recorded Date: Mar-2017

Training CD / USB Drive

$399.00
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(For multiple locations contact Customer Care)
CD/USB and Ref. material will be shipped within 15 business days

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Read Frequently Asked Questions

This process capability analysis webinar will discuss the relationship between variation and accuracy, and process yield, short term versus long term variation, non-normal distributions and how to perform a process capability study.

Why Should You Attend:

Process capability and process performance indices are vital process metrics that are often submitted to customers. The traditional calculation of these indices, however, relies on the assumption that the process follows the normal or bell curve distribution. It is therefore vital to identify the underlying statistical distribution of the critical to quality (CTQ) characteristic before reporting a process performance index.

This 60-minute training session will discuss the relationship between variation and accuracy, and process yield, short term versus long term variation, non-normal distributions and how to perform a process capability study.

Areas Covered in the Webinar:

  1. Relationship between variation and accuracy, and process yield.
    • Accuracy is the degree to which the process is centered on the nominal, which is usually halfway between the specification limits for a normally distributed process.
    • Variation is the spread in the critical to quality (CTQ) characteristic. Less is better, just as a rifle has less variation than a musket.
  2. Short term versus long term variation
    • Short term variation occurs, for example, in the same production lot or batch where all the parts are subject to essentially identical conditions. This variation is the source of the process capability index.
    • Long term variation such as between-lot variation is not accounted for by the short term variation estimate. It, plus the short term variation, is reflected in the process performance index.
    • If the process capability index is significantly larger than the process performance index, the rational subgroup (a sample that reflects all the variation sources in the process) has not been selected correctly.
  3. Non-normal distributions
    • The traditional calculations for capability and performance indices rely on the assumption that the process follows a normal or bell curve distribution. Application of the same mathematical formulas to non-normal data will deliver grossly inaccurate results.
    • Off the shelf methods are however available with which to calculate meaningful performance indices for these processes.
  4. How to perform a process capability study
    • The process must be in control.
    • The rational subgroup must be selected correctly.
    • An adequate data base is mandatory.
    • Always test the assumption that the data follow the normal (or other selected) distribution before reporting results.

    Who Will Benefit:

    The following titles across the manufacturing industry will benefit from this training:

    • Manufacturing
    • Production
    • Quality
    • Engineering
    • Product Management
    • Project Management
    • Technician
    Instructor Profile:
    William Levinson

    William Levinson
    Principal Consultant, Levinson Productivity Systems

    William A. Levinson, P.E., is the principal of Levinson Productivity Systems, P.C. He is an ASQ Fellow, Certified Quality Engineer, Quality Auditor, Quality Manager, Reliability Engineer, and Six Sigma Black Belt. He is also the author of several books on quality, productivity, and management, of which the most recent is The Expanded and Annotated My Life and Work: Henry Ford's Universal Code for World-Class Success.

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Refund Policy

Registrants may cancel up to two working days prior to the course start date and will receive a letter of credit to be used towards a future course up to one year from date of issuance. ComplianceOnline would process/provide refund if the Live Webinar has been cancelled. The attendee could choose between the recorded version of the webinar or refund for any cancelled webinar. Refunds will not be given to participants who do not show up for the webinar. On-Demand Recordings can be requested in exchange.

Webinar may be cancelled due to lack of enrolment or unavoidable factors. Registrants will be notified 24hours in advance if a cancellation occurs. Substitutions can happen any time.

If you have any concern about the content of the webinar and not satisfied please contact us at below email or by call mentioning your feedback for resolution of the matter.

We respect feedback/opinions of our customers which enables us to improve our products and services. To contact us please email customercare@complianceonline.com call +1-888-717-2436 (Toll Free).

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