PTW Software Is Critical to a Digital Safety Process. Your permit to work software, also known as work permitting, is a key pillar for any smart workplace digital safety ecosystem built to prevent workplace accidents. When you standardize how permits are created and managed, anyone in the process from field operator to safety officer has full visibility into the scope, hazards and necessary precautions of the work being conducted. With the easy-to-use and robust work permit software solution from EHS4Safety, your permitting process becomes a cornerstone of your company's culture of safety.