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Marc Schaeffers

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How to Create a Successful FMEA Program

Imagine a team has performed a couple of failure mode and effects analyses (FMEAs) and the outcomes have been positive. In fact, the results have been so successful that the company wants to expand use of the technique enterprise-wide. How can this best be done? This article breaks this expansion process into two stages: 1)…

Recalculating Control Limits

From tedious time consuming task to opportunity for improvement. When applying control charts it is common practice to establish the control limits based on the process capability study and then use fix limits on the chart during production. This method is also frequently applied in SPC software programs. The advantage of using fixed limits is…

From Quality Control to Quality Improvement

Everybody is familiar with control charts for quality control. An example of a control chart is shown below. In the example a packaging company who made blisters for the pharmaceutical industry found the process average for a critical characteristic was out of control. There were some ideas about possible causes but, as in most other…

Integrating SPC and SQC to Overcome Weaknesses in Each

Statistical quality control (SQC) and statistical process control (SPC) are two powerful tools, which have different goals and requirements for successful application. By using a methodology that combines the strengths of both approaches, it is possible to overcome the individual weaknesses of each one. The volume of calculations required by this technique prohibits manual data…

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