optislang is a software platform for cae-based sensitivity analysis, multi-disciplinary optimization (mdo) and robustness evaluation. it is developed by dynardo gmbh and provides a framework for numerical robust design optimization (rdo) and stochastic analysis by identifying variables which contribute most to a predefined optimization goal. this includes also the evaluation of robustness, i.e. the sensitivity towards scatter of design variables or random fluctuations of parameters.