Fundamental to Sonalysts' success in HSI is our development of a variety of engineering tools that support the collaboration between engineering disciplines and the measurement of human performance. Sonalysts' tools have been used in programs including NORTHCOM design, DDG 1000 SMC design, LCS Top Down Functional Analysis (TDFA), Multi-mission Maritime Aircraft (MMA) P-8 TDFA, TSTS/BFTT and many others.