2025-05-16 00:00:00 Permit to Work (PTW) System A Permit to Work (PTW) system is a formalized set of controls used to manage high-risk activities in the workplace. These activities could include maintenance, construction, repair work, and other tasks that pose a significant risk of injury or harm to workers1. Here are the key aspects of the PTW system: Purpose and Objectives: The primary purpose of the PTW system is to ensure that high-risk activities are carried out safely with necessary precautions.