Thomas Edison was the quintessential mistake maker.  He believed that the more mistakes he made, the more wrong answers and wrong solutions he could eliminate and, therefore, the closer he came to the correct solution to his problems.  In management and on projects, on one hand, we seek to minimize mistakes but it is important to recognize when “mistakes” can actually be beneficial and produce positive outcomes.  Indeed, we should not be afraid to make mistakes but rather should try to control and leverage the process.  The project portfolio management process is an ideal place to formally do this.