Competitors to the 12 Factor methodology

I have been following 12factor.net recommendations on a number of projects over the years and it occurred to me, as methodology what are the other options besides 12factor.net . something that gives a set of guidelines to building an app?

when i did some searching wiki redirected me to https://en.wikipedia.org/wiki/Software_development_process which is more management processes/methodologies. i am thinking about competing implementation methodologies?