Performance optimization includes evaluating the job site organization, the logistic and the TBM performance. The TBM behavior in the encountered ground condition is seen on the TBM data logger. Long practical experience helps us to analyze the TBM data and gives you insights into the future development of the project. Some fine-tuning of the TBM parameters will increase the performance of the TBM, save material cost and prevent downtimes. Our modification proposals are always feasible.