For me, I am a firm believer in the fact that no one should tell another writer that their process is wrong. Because you don’t know what works for them.
Just like my process is something that few will ever think is common sense. Because I write two things at once, and that is how I keep inspiration and allow myself to not get tired of a story. I don’t advise anyone else, but neither will I change.
Just like some will draw their characters out or find an image. I don’t because to me appearances are never set, they can change over time. Character traits are far more important, while description of clothing is just another way I use to convey certain character traits.
Some will insist of planning first, while others will simply jump into writing. Some edit as they go, while others will finish a first draft before they even touch a word on the first page.
That is a personal process, and for a writer who has been writing for some time, this is something that will be unique to you. I will suggest Amateur writers follow writing advice to see what works for you, and once you reached a certain proficiency and understanding of yourself. Do things your own way, not their way because many say it works for them. Not necessarily as well for you.
Because only you know yourself, no other writer does. And my process is unlike a lot of writers but it works, in the only way it does.