CMM/CMMI are Software Process Improvement models that have been implemented successfully by many software companies. However, these companies constitute a small fraction of all the companies engaged in software intensive work. While most companies agree that the model based improvement initiative is needed to streamline their activities so as to deliver better quality software faster and at cheaper costs, there is a road block as these models do not provide guidelines as to how to implement them. Watts Humphrey in his overview to the SEI Technical Report by Noopur Davies et al (Relating TSP to SW-CMM ) says the transition from Level 3 to Level 4 is the most difficult one to achieve as many processes have to be redefined. He goes on to show how TSP can accelerate this transition. The Report itself provides data to prove this point. Further Jim Mchale in this presentation (The Case for using TSP with CMM/CMMI ) provides case histories to show how TSP helps in CMMI implementation.