Affordable, easy to use add-in for Excel that creates control charts, histograms, Paretos, and more. Your data is already in Excel, shouldn't your SPC software be there too? QI Macros is an all-in-one toolkit used by quality and process improvement professionals for more than 20 years. In addition to drawing charts you can run statistical tests, create fishbones and value stream maps, and perform complex analysis like Gage R&R and DOE. You'll save time and look like an expert.