One method can work in complement with the other. Basically, with the Tim Ferriss, if you get to profitability in your experiment, you are 100% sure that you w

One method can work in complement with the other. Basically, with the Tim Ferriss, if you get to profitability in your experiment, you are 100% sure that you will get profitability as a business. But if you don't get such result, it doesn't mean you should n't keep testing your idea the Customer Development way.