Tonya Mauldin is a Senior Analytics Software Tester and has been with SAS for more than 17 years. She is responsible for testing a number of quality platforms such as Control Chart Builder, Process Capability, Process Screening, Measurement Systems Analysis, Distribution, Variability, and Attribute Charts. She has used JMP for 16 years and has used SAS software for 23 years. Tonya received a B.S. and a M.S. degree in statistics from North Carolina State University. Prior to joining SAS, she worked as a help desk analyst with Glaxo.
Customers often ask me how to use fixed/baseline control limits. This type of limit is sometimes referred to as historical control limit. Instead of allowing the software to calculate limits based on the data, sometimes you want to use fixed control limits. These fixed control limits are typically created from
In a recent blog post, I discussed control limits and specification limits, where they come from and what they are. This post goes into more detail about specification limits. We will use Process Capability in JMP to generate a capability analysis. We will then use this analysis to make decisions
You may recall my recent blog post, Control Limits and Specification Limits: Where do they come from and what are they. Now that we understand the difference between control limits and specification limits, let's focus on control limits and the stability of a process. Here, I will use Control Chart Builder to create
After talking to customers when I worked in Technical Support and more recently at JMP Discovery Summit conferences and site visits, I realized that there is confusion about the difference between control limits and specification limits. While you may have heard of, or even used both of these in your