Dr. S. Can Gülen (PhD 1992, Rensselaer Polytechnic Institute, Troy, NY), PE, ASME Fellow, has 25 years of mechanical engineering experience covering a wide spectrum of technology, system, and software design, development (GTPRO/MASTER, Thermoflex), assessment, and analysis, primarily in the field of steam and gas turbine combined cycle (109FB-SS, IGCC 207FB, H-System) process and power plant turbomachinery and thermodynamics (in Thermoflow, Inc., General Electric and Bechtel). Dr. Gülen has authored/co-authored numerous internal/external archival papers and articles (40+), design practices, technical assessment reports, and US patents (20+) on gas turbine performance, cost, optimization, data reconciliation, analysis and modelling.