Nov 20, 2018 Process mining is based on uncovering digital traces of business process activities. Essential for process mining is an event log that comprises a case ID, activities, and a time stamp. The time stamp brings the activities into chronological order and helps auditors visualize how process instances actually occurred. Apr 14, 2015 Even after placer mining became more industrialized, hydraulicking continued to be used for removing topsoil and beginning the process of thawing permafrost in advance of enormous gold dredges. In order to thaw many acres of frozen ground, early dredging operations also injected the ground with steam or water.