Timeline for writing a novel

Here’s what I’m thinking. Spend too much time on writing a novel, and it becomes boring and dies. Spend too little, and it’s half-baked crap. Here’s what seems to be a good timeline for me.

Month 0-3: Think about story. Let ideas accumulate while you work on something else. Outline the hell out of it.

Month 3-9: Write the alpha draft, working with alpha-readers to tell a coherent story.

Month 9-10: Rewrite the most egregious plot-holes, to produce the beta draft. Send to beta-readers.

Month 10-11: Let it rest. Let the beta-readers’ comments accumulate.

Month 11-12: Rewrite trouble areas as identified by alpha-readers to produce gamma draft . Send to gamma-readers of typo-correction and cheer-leading.

Month 12-?: Reread the whole thing from beginning to end, fixing whatever problems you can find to produce final draft.

This way I can hopefully avoid reading and re-reading the book until I’m sick of it and I can’t “see” it any more.

What do you guys think? Is this timeline doable for me? Would it be doable for you? How do you do it?