Apart from this two, which other factors can be needed to improve or succeed? Feel free to contribute.
Before you start a business, you must especially monitor the percentage of public interest in the business you want to develop, at least knowing the level of public interest can automatically boost your economy in running a business.
That's absolutely correct. Checking the percentage of people who will be interested in the type of business you want to startup will be good. Because if you don't care about the demand of people around the neighborhood you may run at lost. This is the reason why most people don't progress in business. Apart from that, another thing to consider is The distance at which your goods is coming from. There are businesses which the goods is baugth in a far distance where transportation fee is high and when such fee is added to the price of goods, it scares customers and they gradually leave your shop for another.