The design strength of a ship against extreme loads is to be checked using Global and Local Strength Analysis (GLSA). GLSA process is performed based on the first principle calculation methods. Extreme load analyses are performed for various dominant load cases depending upon ship type. For various dominant load cases an equivalent regular wave is derived following Equivalent Design Wave (EDW) approach. Global strength analysis of jacket platforms, floating units as well as self-elevating platforms, has been carried out by our team to the client's satisfaction.