%0 Journal Article %@ 0378-4754 %A Dellino, Gabriella %A Lino, Paolo %A Meloni, Carlo %A Rizzo, Alessandro %D 2009 %F eprints:747 %I Elsevier %J Mathematics and computers in simulation %K Optimization; Evolutionary algorithms; Kriging metamodels; Design of Experiments; Metamodel management %N 8 %P 2345 - 2360 %T Kriging metamodel management in the design optimization of a CNG injection system %U http://eprints.imtlucca.it/747/ %V 79 %X This paper deals with the use of Kriging metamodels in multi-objective engineering design optimization. The metamodel management issue to find the tradeoff between accuracy and efficiency is addressed. A comparative analysis of different strategies is conducted for a case study devoted to the design of a component of the injection system for Compressed Natural Gas (CNG) engines. The computational results are reported and analyzed for a performance assessment conducted with a data envelopment analysis approach. %Z Nonstandard Applications of Computer Algebra; Applied Scientific Computing VI: Numerical Grid Generation, Approximation and Visualization; Modelling and Managing Financial Risk