This research seeks to investigate how large language models contribute to decision-making in manufacturing settings, with special emphasis on how LLM use influences decision effectiveness and the creation of a collaborative decision-making process between humans and LLMs.
The study adopts a literature review following PRISMA 2020 guidelines. A total of 145 papers were sourced from the Scopus and Web of Science databases (2020–2026). After duplicate removal and title and abstract analysis, 53 papers remained for detailed review. Out of these, 38 papers were included in the study. An additional 9 sources were selected through manual searches, bringing the total to 47. The studies were analysed across four dimensions: decision context, LLM involvement, human–LLM collaboration, and decision outcomes.
The results reveal that LLMs are primarily utilised for decision support purposes at the tactical level in production environments, such as planning, scheduling, diagnostics, and coordination. Despite demonstrating significant abilities in data processing and reasoning, the effect of LLMs on decision quality remains uncertain. Current literature mainly emphasises the technical aspects of LLMs rather than the human-machine interaction process, trust-building mechanism, and integration with organisational practices. Studies usually employ a human-in-the-loop framework, where decision-making remains in human hands.
This study focuses on peer-reviewed journal articles published in English and indexed in Scopus and Web of Science. As a result, some relevant research from other sources or languages may not be included. The study offers insights for organisations adopting LLM-based decision-support systems, emphasising the need for transparency, human intervention, and alignment with decision-making contexts and processes. This study provides a clear picture of how current research on LLMs in manufacturing decision-making is structured and highlights the main gaps that still exist. It shows that future research should go beyond focusing solely on technical capabilities and pay more attention to how humans actually interact with LLMs, as well as to how these systems influence decision quality in real-world situations.
The paper makes an original contribution by integrating scattered literature and highlighting significant knowledge gaps in decision-quality evaluation and human-LLM cooperation in tactical production decision-making.