If you work in any form of engineering then this is probably a familiar idea. I just want to talk about how valuable I find it to be when it comes to RPG design. I've always really liked that the standard in RPGs is to have new "editions", rather than straight-up sequels. And because it is, to greatly generalize, a fairly scrappy and accessible hobby, we get to do lots of communal collaboration. We build on each others' work. We actively encourage the theft of good ideas (within the bounds of intellectual property rights). Most RPGs list their "Rule 0" as being something along the lines of "the GM can and should ignore or change any part of the game they want to if they judge it best for their group." It's like you have a game designer at every table.
The problem is that a lot of folks are pretty amateur as game designers. The single biggest failing, I think, comes from this very gap: not enough would-be designers are engaging with iterative design.
You look at what's come before and you use it as a basis for what you'll create anew. You examine the previous version to understand its design, paying attention to the context which created it and asking yourself whether or not those same factors remain relevant. And at the very least, the common corollary to that rule 0 is this: "a good GM will first make an effort to understand the original rule's purpose before deciding to change it." All-too-often ignored wisdom.
I especially find this to be common in two cases: 1) people complaining about design they don't understand, and 2) people making poorly thought-out houserules. Let's talk about some examples.


