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Reference.org
Gradient-enhanced kriging
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<p>Gradient-enhanced kriging (GEK) is a <a href="/facts/Surrogate_model/6uNjvd8B">surrogate modeling</a> technique used in engineering. A surrogate model (alternatively known as a <a href="/facts/Metamodeling/lA2nkA6J">metamodel</a>, <a href="/facts/Response_surface_methodology/RYwNNlgl">response surface</a> or emulator) is a prediction of the output of an expensive computer code. This prediction is based on a small number of evaluations of the expensive computer code. </p>