I am talking about designing a grid to be robust, and has enough spare capacity to handle difficulties without failing catastrophically. For critical infrastru

I am talking about designing a grid to be robust, and has enough spare capacity to handle difficulties without failing catastrophically. For critical infrastructure, you design for worst-case scenarios, inflate the safety margins, and make backup plans (like a plan to gracefully degrade service). Failing this and cutting corners is what I would call bad planning.