Multiple Plans are Better than One: Diverse Stochastic Planning

Authors

  • Mahsa Ghasemi The University of Texas at Austin
  • Evan Scope Crafts The University of Texas at Austin
  • Bo Zhao The University of Texas at Austin
  • Ufuk Topcu The University of Texas at Austin

Keywords:

Mixed Initiative Planning And Scheduling Systems, Uncertainty And Stochasticity In Planning And Scheduling, Human-aware Planning And Behavior Prediction, Planning For Explainable Machine Learning

Abstract

In planning problems, it is often challenging to fully model the desired specifications. In particular, in human-robot interaction, such difficulty may arise due to human's preferences that are either private or complex to model. Consequently, the resulting objective function can only partially capture the specifications and optimizing that may lead to poor performance with respect to the true specifications. Motivated by this challenge, we formulate a problem, called diverse stochastic planning, that aims to generate a set of representative --- small and diverse --- behaviors that are near-optimal with respect to the known objective. In particular, the problem aims to compute a set of diverse and near-optimal policies for systems modeled by a Markov decision process. We cast the problem as a constrained nonlinear optimization for which we propose a solution relying on the Frank-Wolfe method. We then prove that the proposed solution converges to a stationary point and demonstrate its efficacy in several planning problems.

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Published

2021-05-17

How to Cite

Ghasemi, M., Scope Crafts, E., Zhao, B., & Topcu, U. (2021). Multiple Plans are Better than One: Diverse Stochastic Planning. Proceedings of the International Conference on Automated Planning and Scheduling, 31(1), 140-148. Retrieved from https://ojs.aaai.org/index.php/ICAPS/article/view/15956