C4 is pretty easy to learn, Arc42 has some sample documents that are very useful. They complement each other. https://c4model.com/ https://c4model.com/ https:

C4 is pretty easy to learn, Arc42 has some sample documents that are very useful. They complement each other. https://c4model.com/ https://c4model.com/ https://arc42.org/documentation/ https://arc42.org/documentation/ PRINCE 2 documents also come with a 'decision log', if you want something in a formal template.