Time Related Failure Posted on 23rd December 20154th May 2021 by ThePD (The Project Definition) A Time Related Failure is the frequency that a device or system fails, expressed in failures per unit of time. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in HSE and tagged failure, safety. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.