To me, success is achieving the goals set at the onset of the project within a defined timeframe. Without setting a goal, each endeavor is endless and without direction. In terms of business, I would set a goal of number of customers or gross monthly income. Once these goals have been met, it is time to reevaluate to see if the business can support setting new goal or in the case of not meeting your goals, it is necessary to critically evaluate to determine a root cause and pivot the business to achieve the original goal or possible set new goals based on new information or data.