on Jane Friedman site:
Some writers can sit at their computers, come up with an idea for a scene, and start writing. If they’re experienced novelists, they might write a pretty good scene out the gate.
It’s likely, though, they’ll end up rewriting the scene multiple times until it starts to gel. Or they’ll throw the scene out and chalk up the hour or two spent as part of the process.
And that’s not a bad process necessarily. It might be just the process a certain writer needs to end up with a terrific scene. But it’s not the best process for the beginning writer. Or for the writer who doesn’t want to needlessly waste a lot of time and effort.
Anyone who says writing a scene is easy probably hasn’t written one (or, at least, written one worth reading). There are so many elements that make up a great scene, and so many things to juggle as you write.
And then there are all the preparatory issues to be considered before you begin. Questions that must be answered: