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Presenter: Byron Wingerd, JMP Systems Engineer

Topic: Root Cause Investigations and Graphical Approaches

Topic Summary:
Diagnosing the root cause of shifts, drifts and trends in complex manufacturing processes can lead to large data sets that catalog changes to each step and input. Maintaining a focused approach to an investigation can be difficult while attempting to balance the biases and beliefs of investigation sponsors with those of multidisciplinary root cause analysis “teams.” Such distractions can easily overshadow the complexity of the process under investigation.  One approach to this challenge is to exclude categories of competing causes as quickly as possible to focus the investigation team’s resources in unified directions. A simple graphical tool can be useful when clear process changes are experienced; however, less well defined process changes and large numbers of categorical process inputs with frequent level changes mixed with continuous variables can lead to project delaying fishing expeditions.
Decision trees and regression trees can enable the systematic selection of good candidates from long lists of parameters. These tools can scan large lists to help uncover terms that drive cost, quality or specific metrics. This presentation will demonstrate the use of partition trees in a case study of a retrospective process investigation and the implementation of a graphical test that was useful for screening cause-and-effect relationships for categories of process inputs.

Presentation Now Available! Click HERE to view the presentation from this Six Sigma Meeting.

Date: Tuesday, January 22, 2013

Time: 5:30-7:30 pm  Networking 5-5:30pm, Presentation 6-7pm,
                                 Q&A and group announcements 7-7:30pm

Location: Greg Poole Equipment Company
                 4807 Beryl Road
                 Raleigh, NC

Snacks and refreshments are available. Attendees are welcome to bring a bag lunch.

Presenter’s Bio:
Byron Wingerd works as a Systems Engineer in the JMP division of SAS, where he supports sales and customer development in the Southeast.
Before joining SAS, Wingerd worked in biologics manufacturing for the pharmaceutical industry. He was a Process Engineer for Merck in West Point, PA and, earlier, a Senior Scientist at Emergent BioSolutions, where he was responsible for vaccine production and development. In that role, he used Six Sigma methodology for improving vaccine manufacturing processes. Wingerd also was the subject matter expert for the company’s BioThrax vaccine. Before graduate school, he worked for Abbott Laboratories, producing monoclonal antibodies for use in clinical diagnostic medical devices.
Wingerd graduated from Trinity International University in Deerfield, IL, where he majored in pre-med biology. He earned a PhD in microbiology and cell and molecular biology from Michigan State University in East Lansing. As a post-doctoral fellow at Michigan State’s Center for Integrated Plant Systems, Wingerd researched plant defense mechanisms.
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