Team effectiveness is enhanced by a team's commitment to reflection and on-going evaluation. In addition to evaluating accomplishments in terms of meeting specific goals, for teams to be high-performing it is essential for them to understand their development as a team. Most of us are familiar with the concept of "the terrible twos" in early childhood; understanding that developmental stage makes it easier to accept the constant stream of "No No No No" that we might hear from a two-year old.| hr.mit.edu