The present invention relates to a process for the preparation of -3-amino-N-cyclopropyl-2-hydroxyalkanamides as well as novel compounds prepared or used in the process. Additionally, the method includes calculating an advanced process control recipe parameter adjustment distribution value and determining if sampling is indicated. The lens assembly includes at least one lens operable to capture an image of the area surrounding and including the line of sight. The method may also include determining a hand location using the determined threshold for the extracted hand region in the at least one captured frame. A current flowback parameter is measured and the influx is determined when the current flowback parameter meets the alarm threshold.