When we create new brand identities for client we usually also produce a style guide. Canva have put together a great list: 50 Meticulous Style Guides Every Startup Should See Before Launching:
A brand is like a machine.
It’s made up of lots of little parts that work together to make the whole. When assembling this machine, if you forget a part, or screw it in incorrectly, you risk the machine not working, or worse – breaking all together. So, when assembling your brand-machine, one way to avoid breaking it before you begin is to follow the handbook.
It’s just one of the ways you can make design easier in your workplace – creating a simple booklet that catalogues the specific colours, type, logos, imagery, patterns, taglines, etc. of your brand. Having all of these tiny details recorded and defined allows for you to maintain your brand and make sure your machine runs smoothly, with all parts intact.