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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? Clearly, controlling everything is not feasible or a smart use of limited resources. In an earlier Ask the Expert topic, we discussed the philosophy of process control as opposed to inspection … Continued
Let’s take the confusion out of Cpk and Ppk. Just like control charts tell us about the stability of the process, capability analyses tell us about process capability. Capability Indices help us judge whether the process is capable of producing parts that are within specifications. Among the various capability indices, Cpk and Ppk are popular … Continued
Many manufacturing leaders believe that their production personnel use SPC properly, but the evidence suggests otherwise. Statistical Process Control (SPC) is a method that enables manufacturers to prevent problems and to control their production processes. Unfortunately, it is rarely applied correctly, so manufacturers tend to be inefficient, reactive, and even unprofitable. Upon investigating most warranty, … Continued
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. The burden of warranty costs Recent news offers a reminder that huge opportunities still exist to reduce warranty costs that drain manufacturers’ bottom lines. Consider that during the … Continued
EWMA or Cusum charts are the best charts for detecting process shifts less than 1σ. Typical control charts, such as Xbar & R and X & Mr, indicate whether or not a process is statistically stable. They detect process changes greater than 1.5σ and, because of this, are not the best tool to detect small … Continued
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. When applied properly, SPC provides manufacturers a proven method to increase profitability and achieve a deeper understanding of their processes. Additionally, SPC can … Continued
The purpose of control charting is to regularly monitor a process so that significant process changes may be detected. These process changes may be a shift in the process average (Xbar) or a change in the amount of variation in the process. The variation observed when the process is operating normally is called common cause variation. When … Continued
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. Statistical Process Control (SPC) charts allow timely detection of assignable causes of process changes (e.g. shifts, trends, variation). This allows root causes to be determined and allows the production team to … Continued
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Operator Instruction Card.pdf
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WinSPC Knowledge Base
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DataNet built WinSPC with the goal of helping manufacturers lower operation costs through responsive, automated statistical process control. In this section, you can find videos to help introduce yourself to WinSPC, take a deeper dive into expert functionality, or get more detail about the business value of SPC.
In this section, you will find posters and Powerpoint slides that summarize SPC benefits and illustrate SPC concepts.
WinSPC Real-time Leaders Poster
Introductory SPC Posters (color)
In this section, you can download brochures about WinSPC, WinSPC Envision, WinSPC Cloud, QualTrend, Custom Web Reporter, and DataNet’s support and training programs.
If you are embarking on a WinSPC implementation, you will find materials here to help you on your way and get you thinking about potential project goals. For those not performing a WinSPC implementation, but who may want more information about implementation for planning purposes, the materials in this section will be of assistance.
Here is helpful information on a few industry topics that may be of assistance in your situation, including a white paper on measuring and reducing cost.
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Contact WinSPC Sales at +1 248.357.2200 or email sales@winspc.com. They can help you to define your solution and associated costs or connect you with a regional reseller near your manufacturing facility.
WinSPC is licensed based on concurrent usage. A purchase of 25 licenses, for example, in general, permits up to 25 computers to use WinSPC at the same time.