Keox Technologies occasionally encounters a request in measuring particle size distribution.  That is, when making measurements on powders, minerals, rice, beans, grains, and even contaminant particles, a specific dimension number isn’t given but rather a distribution (or terminology used more in the Imaging world, a histogram).   The challenging part is how to determine if one distribution is similar to the control distribution or if it’s significantly different?  How does Process Engineering determine if incoming raw materials are within specification or that the fabrication process is out-of-control?   There are many different metrics of comparing – ranging from simple to
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