In the technical hierarchy of product development, Product Safety is the non-negotiable foundation upon which everything else is built. As a technician, I often tell my clients that while a failure in EMC might result in a noisy signal, a failure in product safety can lead to catastrophic harm with legal consequence. This category focuses on the systematic identification of hazards. The most important are electric shock, fire, mechanical instability, and thermal burns. You will find guides on the implementation of safeguards to mitigate them. We move beyond simple “pass/fail” results to understand the engineering principles behind standards like IEC 62368-1 and ISO 12100.