CPeT-IT is all about interpretation of CPT data. Profiles of cone resistance, sleeve friction and excess pore pressure behind the cone tip provide valuable information over the penetration depth, that can be used to summarize soil stratigraphy not only in terms of soil type description but also in terms of mechanical characteristics. After all design engineers care more about a single parameter value rather than a series of values with ups and downs.

The typical geotechnical section module in CPeT-IT provides a way to summarize overall CPT performance in one single plot where cohesive and cohesionless soil types (mechanical behavior based on what the cone senses) are presented in the form of homogeneous layers. Extrapolating soil layers based on qt profile using only a visual inspection is not a difficult task for those with some experience but again this task may prove quite time consuming. On the other hand it is more than obvious that the cone senses changes is soil stratigraphy and captures this information in the variables that it measures. So, using a uni-variate and simple statistic analysis of the cone resistance profile, based on published work by Prof. Campanella, we created a smart tool that may assist in a quick identification of soil boundaries in a CPT profile. Although various complex and computationally "heavy" methods are described and proposed from various researchers, this simple and "light" technique turned out to have quite impressive output results. The procedure was not programmed to be fully automated in order for the user to control all calculation parameters while very quickly can fixate the values and extract the desired profile.

Although CPT equipment has changed dramatically over the years, applicability is boosted over many investigation fields and new interpretation formulas have been derived (and will continue to appear in the future) some things from the past just seem to stand there, waiting silently to be adopted and perform well using our latest technology.