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FLEXO Magazine : October 2013
of the time. Therefore, this example shows a study that yields positive results. The example in Figure 4 shows a Gauge R&R study that yielded poor results. The goal for this study was to determine how well the gauge measures 80 percent dots on finished plates from standard digital and flat top dot workflows. The %SV for Gauge R&R is close to 100 percent, and the part-to- part value is almost zero. Looking at the data in Figure 5, %SV for Total Gauge R&R is 99.92 percent and that comes from the reproducibility component of R&R, meaning that something is up with the operators. Analyzing the part-by-operator chart in Figure 4, all of the readings for operator “L” are much lower than those for operators “R ” and “Z .” In this case, operator L did something differ- ent. It could be that the operator used a differ- ent procedure to take measurements, set up the machine incorrectly or had difficulty getting the gauge to detect the edge of the dots. Furthermore, in Figure 5, the number of distinct categories is one, indicating that the gauge cannot discrimi- nate between parts. This is supported by the fact that the standard deviation for total Gauge R&R is 45.7 . Overall, this study has yielded poor results and corrective action, such as retraining the operator or ensuring he/she is following the correct measurement procedure, will need to be taken in order to ensure a quality outcome. good dAtA = good resuLts Brands all over the world will continue to depend on flexo - graphic printing to ensure the consistency of their brand look and message and printers that are able to deliver con- sistency in printed pieces will be the most successful. The only way to ensure consistent results on press is to use good data and the best way to ensure data is good is to perform Gauge R&R studies. In using Gauge R&R, the most important things are: • Clearly defining the goal • Choosing the best parts to achieve the goal • Understanding the key values of the results in order to determine if the data is good or if improvements need to be made Remember, having the data is one thing, but having good data is what really counts. n About the Author: Courtney Norris is a grad- uate of Clemson University with a Bachelor’s of Science in Graphic Communications. She joined DuPont Packaging Graphics 2012 as a Cyrel applications specialist and is currently working with the R&D Applications Team. Brand managers require brand color integrity. Designers want color accuracy. Production must control color. Cost is critical to everyone. Thoroughly expand your knowledge on how to maintain a brand’s color integrity across product lines and through various production processes— all while keeping costs in line at the 2013 Color Management Conference, December 7–10, 2013 at the Arizona Biltmore, Phoenix, AZ. Learn more about the color event of the year at Learn From Top Color Expert Keynotes • Russell Brown, Adobe Sr. Creative Director, will be presenting “The Russell Brown Show: Live!” • Sven Seger, of the world famous Future Brand. Sven is the mastermind behind the rebranding of American Airlines. ...but will the color match? “Terrific! Can we be sure that the color on press will look like this proof? Susan, Brand Manager “Terrific! But I don’t see a measurable target on the proof to verify color accuracy.” Doug, Color Manager “Terrific! I approve the proof...the press sheet will match this, right?” Jennifer, Designer “Terrific! But these purples are a nightmare to reproduce on press!” Eric, Pressroom Manager www.printing.org/color CMC Full Page Ad FINAL 8.25x11.25.indd 1 9/27/13 11:34 AM I In partnership with 24 FLeXo OCTOBER 2013 www.flexography.org Figure 5