Computing optimal (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si5.svg"><mml:mrow><mml:mi>R</mml:mi><mml:mo>,</mml:mo><mml:mi>s</mml:mi><mml:mo>,</mml:mo><mml:mi>S</mml:mi></mml:mrow></mml:math>) policy parameters by a hybrid of branch-and-bound and stochastic dynamic programming
European journal of operational research