On the Prospects of Incorporating Large Language Models (LLMs) in Automated Planning and Scheduling (APS)
Vishal Pallagani, Kaushik Roy, Bharath Muppasani, Francesco Fabiano, Andrea Loreggia, Keerthiram Murugesan, Biplav Srivastava, Francesca Rossi, Lior Horesh, Amit Sheth
TL;DR
The paper surveys the integration of Large Language Models (LLMs) into Automated Planning and Scheduling (APS) across eight categories, based on 126 recent works. It argues for a neuro-symbolic future where LLMs complement symbolic planners, combining language-enabled reasoning with precise plan generation. Key findings highlight both the strengths of LLMs in language interfaces and knowledge grounding, and the limitations in producing robust, scalable plans without symbolic back-ends. The work outlines future research directions, including new training paradigms, explicit neuro-symbolic taxonomies, and standardized metrics to evaluate LLM-assisted planners, with practical implications for the ICAPS community.
Abstract
Automated Planning and Scheduling is among the growing areas in Artificial Intelligence (AI) where mention of LLMs has gained popularity. Based on a comprehensive review of 126 papers, this paper investigates eight categories based on the unique applications of LLMs in addressing various aspects of planning problems: language translation, plan generation, model construction, multi-agent planning, interactive planning, heuristics optimization, tool integration, and brain-inspired planning. For each category, we articulate the issues considered and existing gaps. A critical insight resulting from our review is that the true potential of LLMs unfolds when they are integrated with traditional symbolic planners, pointing towards a promising neuro-symbolic approach. This approach effectively combines the generative aspects of LLMs with the precision of classical planning methods. By synthesizing insights from existing literature, we underline the potential of this integration to address complex planning challenges. Our goal is to encourage the ICAPS community to recognize the complementary strengths of LLMs and symbolic planners, advocating for a direction in automated planning that leverages these synergistic capabilities to develop more advanced and intelligent planning systems.
