Response surface methodology revisited


Angün E. , Kleijnen J. P. , Den Hertog D., Gürkan G.

Proceedings of the 2002 Winter Simulation Conference, San Diego, CA, United States Of America, 8 - 11 December 2002, vol.1, pp.377-383 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: San Diego, CA
  • Country: United States Of America
  • Page Numbers: pp.377-383

Abstract

Response Surface Methodology (RSM) searches for the input combination that optimizes the simulation output. RSM treats the simulation model as a black box. Moreover, this paper assumes that simulation requires much computer time. In the first stages of its search, RSM locally fits first-order polynomials. Next, classic RSM uses steepest descent (SD); unfortunately, SD is scale dependent. Therefore, Part 1 of this paper derives scale independent 'adapted' SD (ASD) accounting for covariances between components of the local gradient. Monte Carlo experiments show that ASD indeed gives a better search direction than SD. Part 2 considers multiple outputs, optimizing a stochastic objective function under stochastic and deterministic constraints. This part uses interior point methods and binary search, to derive a scale independent search direction and several step sizes in that direction. Monte Carlo examples demonstrate that a neighborhood of the true optimum can indeed be reached, in a few simulation runs.