One of the most crucial tasks an entrepreneur has is to calculate the size of their market, and the potential value that market has for their startup business. Without this data you can’t create a viable business plan, or be taken seriously when approaching potential investors.

As described in my book, The Art of Startup Fundraising, the market needs to be in the billions. Otherwise, even if you have the perfect team and product the returns will be limited for potential investors making your investment opportunity less attractive.

Read more at Forbes.