In the previous chapters we presented a precision checking approach for noiseless data. However, noise is present in most real-life cases. Moreover, the behavior reflected in the log can only be considered as an example of the real process behavior. This chapter presents the adaptation of the precision presented in the first chapters of this book in order to be more robust against noise, and it provides a technique to assess the confidence on the variability of measure in the future. In the next chapter we will assess the severity of the precision issues detected.