cs.ROJun 2, 2026

WorkBenchMark: A LEGO-Based Assembly Benchmark with an Assembly-by-Disassembly Baseline for the Smart Manufacturing League

Authors: Wenbo Ma, Daniel Swoboda, Matteo Tschesche, Till Hofmann

Organizations: Chair of Machine Learning and Reasoning (i6), RWTH Aachen University, Aachen, Germany · MASCOR Institute, FH Aachen University of Applied Sciences, Aachen, Germany

Abstract

We introduceWorkBenchMark, a LEGO Duplo-based robotic assembly benchmark motivated by the RoboCup Smart Manufacturing League. Robotic assembly couples low-level manipulation with task-level symbolic reasoning under physical constraints, a combination that current end-to-end learning methods do not yet solve reliably. The benchmark provides 400 tasks across four complexity tiers. We provide an open-vocabulary perception, Assembly-by-Disassembly baseline solution. Our planning-based pipeline outperforms a modern vision-language-action approach across all tiers. The benchmark, simulation environment, and baseline implementation will be released openly to support the broader robotic assembly community.

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