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Statistical process control is certainly not the only technique used to improve processes. But for our purposes here, we will focus on two of the tools used most in SPC:
LEARN MORE: SPC TOOLS FOR ANALYSIS
Histograms can provide a quick view of process variation and are used to plot frequency distributions.
Control charts are the best-known tools associated with SPC.
Control charts are used to determine whether a process is stable or unstable. There are many types of control charts that can be used to fit the nature of different types of data streams and sampling methods.
Below are examples of the most commonly used control charts:
Control charts are discussed further in the Process Behavior and SPC Control Charts section as well as in our Definitive Guide to SPC Charts.
LEARN MORE: DEFINITIVE GUIDE TO SPC CHARTS
Although SPC charts are revealing, today’s manufacturers increasingly recognize the benefits of moving away from manual SPC—conducted by recording data on paper and then running analysis via offline spreadsheets or statistical software—and instead using real-time SPC software.
Quality control software for manufacturing offers multiple benefits:
InfinityQS is the leading provider of SPC software and services for manufacturers, providing quality intelligence solutions that work in the cloud or on-premises, across the globe.
LEARN MORE: SPC SOFTWARE FOR MANUFACTURING
Remember: Using statistical process control just to “put out fires”—finding an out-of-control point on a control chart and then determining and removing the assignable cause—is not the same as creating continuous improvement. SPC can be fully realized only when you use it to improve processes and reduce variation.