Consistency and quality are central to a good user experience. But despite your — or your product team’s — best intentions, inconsistencies and unintended consequences will inevitably crop up. And if you're not careful, you'll end up with a poor user experience and a lot of design debt. We all know it takes a lot longer to dig yourself out of debt than it does to avoid it in the first place, so we try to avoid design debt from the start by explicitly including design review and design QA in our process.