Decision-making is one of the most difficult skills to master as a manager. A startup CEO literally sees a constant stream of decisions to be made: from hiring and firing, to Android or iOS, all the way to Lack or Billy. As the company grows to 10–20 people (usually mostly engineering) the bonds and shared experiences continue support decision-making at the micro-level. Once a team grows larger there is a need for management and delegation. While growth is a positive it also a stressful time for the company and founder/CEO.