Okay kiddo, have you ever seen a special room in a hospital where doctors and nurses test and check everything to see how someone's body is doing? It's like they are detectives trying to figure out what's wrong with someone.
Well, before they even get to that room, they have a plan. They have a list of things they need to check and test out to see what could be the problem. This plan is called a 'diagnostic design specification.'
The doctors and nurses put their heads together and create a sort of checklist to follow. They write down all the tests they need to do, the questions they need to ask, and the things they need to observe when they are trying to figure out what is making someone sick.
Think of it like making cookies. Before you start to put all the yummy ingredients together, you need a recipe to follow. The recipe will tell you what ingredients you need, how much of each, and how long to put them in the oven. It's the same with the diagnostic design specification. It's the recipe that the medical team follows when they are trying to figure out why someone is not feeling good.
Once they have the diagnostic design specification, they can start running tests and experiments to find out the problem. They will take lots of notes and make sure they don't miss anything important.
So basically, a diagnostic design specification is like a plan that doctors and nurses make before they try to figure out why someone is sick. It helps them know what they need to check, and makes sure they don't miss anything important. It's like a recipe for being a good doctor!