How are decisions made at Riot?

Hi Everyone,

I was watching some videos about the updated Pulsefire Ezreal and what appear to be his chromas. This got me thinking about how Riot's design teams decide on which designs make it into the game. By extension it made me wonder; how do Rioters decide when to revive scrapped concepts for later use? I've seen somewhere online that there are skins and champs that are based on/ inspired by concepts for past skins, champs, lores...etc.

I figure there has to be some hierarchy where teams pitch multiple ideas and send those ideas up a chain of command to where be some executive makes a decision. For that matter how and/or why are changes made along the design process? Who decides what to change and why to change it?

If anyone could confirm and go in depth on the subject I'd really appreciate it.