By using cusum graphs of many properties, the cause of changes in concrete quality can be deduced by correlating the change points among the properties. This correlation enables confirmation of the change long before there are sufficient strength results to establish a statistical certainty of it. If measurements of strength, density, slump, and temperature all support a strength change and explain what caused it, then very few results are needed to be sure it happened.

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When building a new headquarters for his concrete contracting company, the author decided to make the slab for the warehouse a working showplace. Using a concrete mixture that contained a high volume of large maximum size coarse aggregate to reduce shrinkage and macro polymeric synthetic fibers to help minimize plastic and drying shrinkage cracking, the joint spacing for the 6 in. (150 mm) thick slab was pushed to a 25 ft x 20 ft 10 in. (7.6 x 6.4 m) grid. Even after a year in service, the slab has an overall average FF 48/FL 38.