What are the main things that go in to creating and publishing a traditional mag!

What are the main things that go in to creating and publishing a traditional magazine(not anonlineone).Details

I know that you have to have material, of course and a program like Adobe InDesign to create the layout of the magazine and everything. But, what else? Is there anything specific that all magazines need? Like, I know for a book you have to get a USBN code. So, what goes in to self publishing a magazine? Only serious and thoughtful answers please!!!!!!!!!!!!!!!!!!!!

THANKS!!!

There are just too many things to honestly give you near an accurate answer in this space. A few things to keep in mind:

You need financial backing.
You must know your audience and what they want.
Know your demographic and circulation for the advertisers.
You need to know how to recruit advertising and how to keep your advertisers.
You need to know how to market.
You need to know where and how your magazine will be sold and displayed.
You need to know how to do a mock layout.
You need to know how to select the cover shot and stories.
You need to know how to arrange the layout.
You need to be aware of what type of product you want to produce. Will there be a lot of photographs, if so, do you need to invest in the higher grade of magazine paper.
Who will print or where will you print the magazine.
What is your cost?
etc.........................et...