Up until three years ago, a firm opened an average of ten new retail stores a year. One of every ten new stores had to be closed within two years due to poor sales. This $90$ percent success ratio was fairly steady for over $30$ years. Starting three years ago, the firm has opened $40$ new stores and each one had significant profits within six months. Management believes their recent success is not just a random event and that all future stores will be profitable. Thus, the managers have decided to open a minimum of $15$ new stores each year. The managers are suffering from: