Stochastic Storage/retrieval Scheduling Considering Shuttle Failure in Multi-shuttle Automated Storage and Retrieval System

Uncertainty has great impact on the original schedules of multi-shuttle Automated Storage and Retrieval Systems (AS/RSs). When shuttle failure occurs during planning horizon, scheduling solution under deterministic circumstance will become infeasible and the reschedule work is needed. It will result into extra expense or loss. In our study, we propose a stochastic integer programming model to handle scheduling problem under shuttle failure in multi-shuttle AS/RS. Numerical experiments are designed to validate the robustness of our solution to tackle various uncertainty of shuttle failure.