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Your business plan must have the following:

1. A strong and viable idea.
2. Go-to-market strategy.
3. Customer acquisition strategy.
4. Customer retention strategy.
5. Well defined revenue model.
6. Financial projections for 3–5 years.
7. Credentials of core team.
8. Exit strategy.

Once you start working on the above, you will be able to add more parameters to this list.

Good Luck.....