What is SPC?Introduce yourself to the basics of statistical process control and why it is vital for manufacturers.
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DocumentsRead our whitepapers and documentation to explore WinSPC even more deeply.
WinSPC KnowledgebaseExplore technical posts about getting things done with WinSPC.
This is a crucial distinction that is frequently confused. Basically, specification limits have to do with the voice of the customer while control limits have to do with the voice of the process. (more…)Read More
Nothing and everything. Though they are not directly linked, statistician and SPC expert Steven Wachs cautions that without evidence of process stability, capability data is useless. (more…)Read More
It’s not subjective: Because it’s an objective measure of variation, standard deviation is an essential statistical tool for increasing quality. (more…)Read More
The key is to specify a subgroup size so that significant shifts are detected with high probability and that insignificant shifts are unlikely to produce a signal. (more…)Read More
While the construction of control charts is relatively straightforward, often a more difficult question is: how do I know what process characteristics to control in the first place? (more…)Read More
By systematically detecting (and rectifying) sources of special cause variation upstream in the process, the important process outcomes become predictable. (more…)Read More
More companies are leveraging high speed vision systems to inspect multiple quality characteristics on their products. (more…)Read More
In order to maximize profitability while complying with government regulations regarding net package contents, food manufacturers and packagers must achieve an optimal balance. (more…)Read More
An approach to deploying control charts with short production runs is to utilize charts of common characteristics across different products. (more…)Read More
Characteristics with larger nominal values tend to have more variation than characteristics with smaller nominal values. (more…)Read More
Looking just at the auto industry, GM has recalled roughly 3 million vehicles this year in the U.S. alone. In 2009, GM recalled roughly 2.2 million vehicles. (more…)Read More
Unfortunately, applying "simple" tools at the expense of tools with considerably more value (and really not much more complexity or difficulty) doesn't cut it. (more…)Read More
The purpose of control charting is to regularly monitor a process so that significant process changes may be detected. (more…)Read More
An OC curve allows practitioners to determine a sample size that will result in the detection of those process changes that are of practical significance while minimizing the occurrence of false alarm. (more…)Read More
Yes, you can chart deviation-from-target. You do this by creating a Target chart, a chart that plots the deviation of subgroup values from a target value. (more…)Read More
As the bumper sticker says, "Shifts Happen" and so we generally want to use the slightly more liberal process capability of Cpk ≥ 1.33. (more…)Read More
Process Control is proactive rather than reactive. The key elements of process control are outlined in this article. (more…)Read More
February 21, 2019 Careful consideration of some fundamental aspects of Statistical Process Control (SPC) can go a long way toward determining whether or not manufacturers are able to effectively prevent problems and control their production processes. (more…)Read More
February 7, 2019 Real-time SPC saves time for both quality control and engineering personnel. "What used to take three days takes one afternoon," said one process engineer. (more…)Read More
January 24, 2019 This is a crucial distinction that is frequently confused. Basically, specification limits have to do with the voice of the customer while control limits have to do with the voice of the process. (more…)Read More
January 10, 2019 Certificates of Analysis help set the stage for success in manufacturing partnerships and reduce confusion. (more…)Read More
January 2, 2019 There is a balance between automation, and feedback. If you totally remove the operators away from the feedback of periodic measurements, they may be less aware of the nuances of the process over time. (more…)Read More
December 13, 2018 A large player in the fluid tank industry has installed WinSPC to prevent quality issues with preventative alerts on a critical aspect of the process. (more…)Read More
November 29, 2018 Operator ownership of production problems is necessary, but emails to supervisors about process changes allow you to get involved when appropriate. (more…)Read More
November 15, 2018 We find that there are 3 common practices among companies who are effectively minimizing process variation. (1) Real-time monitoring of manufacturing with operator access to data. (2) Visualization of process output for operators and supervisors. (3) Investigation...Read More
November 1, 2018 Total Productive Maintenance places shop floor workers in a position of responsibility, and stresses continually paying attention to what's going on with the process. (more…)Read More