Solutions of the single elevator scheduling problem for emergency evacuations

WANG Jing; WANG Shuning

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (5) : 550-557.

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Solutions of the single elevator scheduling problem for emergency evacuations

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Abstract

This study considers the minimization of the evacuation time for a single elevator for emergency conditions when all the evacuees are waiting in the elevator halls before the evacuation begins. Integer programming (IP) and a heuristic algorithm are used to formulate the problem as an equivalent integer linear programming problem that includes the elevator operation constraints and linearizes the nonlinear constraints. The heuristic algorithm maximizes the number of evacuees evacuated in each roundtrip while minimizing the number of visits to the floors. Numerical tests verify the improved evacuation speed given by this algorithm relative to existing algorithms.

Key words

emergency evacuation / elevator dispatching / integer linear programming / subset-sum problem

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WANG Jing, WANG Shuning. Solutions of the single elevator scheduling problem for emergency evacuations[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(5): 550-557

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