The out-of-the-loop performance problem (OOL or OOTL[ 1] ) arises when an operator suffers from performance decrement as a consequence of automation .[ 2] [ 3] The potential loss of skills and of situation awareness caused by vigilance and complacency problems might make operators of automated systems unable to operate manually in case of system failure.[ 4] Highly automated systems reduce the operator to monitoring role, which diminishes the chances for the operator to understand the system.[ 5] It is related to mind wandering .[ 5]
OOL is also known as out-of-the-loop syndrome [ 6] and out-of-the-loop effect .[ 7] One of the first mentions of the term "out of the loop" is found in a patent by Willard Meilander from Goodyear Aerospace Corporation for automated aircraft control in 1972.[ 8] [ 9] More early mentions of OOL came up in the context of flight automation in 1980s.[ 10]
Three Mile Island accident in 1979, USAir Flight 5050 crash in 1989, Air France Flight 447 in 2009 and the loss of $400 million by Knight Capital Group in 2012 are attributed to OOL.[ 3] [ 11]
Automatic train operation [ edit ]
Automatic train operation is meant to reduce manual operation. This results in OOL performance problem for train drivers .[ 12]
^ Merat, Natasha; Seppelt, Bobbie; Louw, Tyron; Engström, Johan; Lee, John D.; Johansson, Emma; Green, Charles A.; Katazaki, Satoshi; Monk, Chris; Itoh, Makoto; McGehee, Daniel; Sunda, Takashi; Unoura, Kiyozumi; Victor, Trent; Schieben, Anna; Keinath, Andreas (1 February 2019). "The "Out-of-the-Loop" concept in automated driving: proposed definition, measures and implications" . Cognition, Technology & Work . 21 (1): 87– 98. doi :10.1007/s10111-018-0525-8 . hdl :10919/93316 . ISSN 1435-5566 . S2CID 52279007 .
^ Endsley, Mica R.; Kiris, Esin O. (June 1995). "The Out-of-the-Loop Performance Problem and Level of Control in Automation" . Human Factors: The Journal of the Human Factors and Ergonomics Society . 37 (2): 381– 394. doi :10.1518/001872095779064555 . ISSN 0018-7208 . S2CID 2147200 .
^ a b Kaber, David B.; Endsley, Mica R. (1997). "Out-of-the-loop performance problems and the use of intermediate levels of automation for improved control system functioning and safety" . Process Safety Progress . 16 (3): 126– 131. doi :10.1002/prs.680160304 . ISSN 1066-8527 . S2CID 14070085 .
^ "DIN SPEC 91516:2025-07, Human performance regarding the dynamic driving task for the specification of AI in ATO" (in German). DIN Media GmbH. doi :10.31030/3625051 . Retrieved 28 June 2025 .
^ a b Gouraud, Jonas; Berberian, Bruno; Delorme, Arnaud (1 January 2018). "Chapter 54 - Link Between Out-of-the-Loop Performance Problem and Mind Wandering: How to Keep the Operator in the Loop" . Neuroergonomics . Academic Press: 239. doi :10.1016/B978-0-12-811926-6.00054-3 . ISBN 9780128119266 .
^ Nadj, Mario; Maedche, Alexander; Schieder, Christian (1 August 2020). "The effect of interactive analytical dashboard features on situation awareness and task performance" . Decision Support Systems . 135 : 113322. doi :10.1016/j.dss.2020.113322 . ISSN 0167-9236 . PMC 7234950 . PMID 32834262 .
^ Endsley, Mica R. (February 2017). "From Here to Autonomy: Lessons Learned From Human–Automation Research" . Human Factors: The Journal of the Human Factors and Ergonomics Society . 59 (1): 5– 27. doi :10.1177/0018720816681350 . ISSN 0018-7208 . PMID 28146676 . S2CID 3771328 .
^ Merat, Natasha; Seppelt, Bobbie; Louw, Tyron; Engström, Johan; Lee, John D.; Johansson, Emma; Green, Charles A.; Katazaki, Satoshi; Monk, Chris; Itoh, Makoto; McGehee, Daniel; Sunda, Takashi; Unoura, Kiyozumi; Victor, Trent; Schieben, Anna; Keinath, Andreas (1 February 2019). "The "Out-of-the-Loop" concept in automated driving: proposed definition, measures and implications" . Cognition, Technology & Work . 21 (1): 87– 98. doi :10.1007/s10111-018-0525-8 . hdl :1721.1/118125 . ISSN 1435-5566 . S2CID 254136498 .
^ Meilander, Willard C. (6 June 1972). "Method and apparatus for vehicle traffic control" . Retrieved 26 March 2023 .
^ Wiener, Earl L.; Nagel, David C. (1988). Human Factors in Aviation . Gulf Professional Publishing. ISBN 978-0-12-750031-7 .
^ Berberian, Bruno; Gouraud, Jonas; Somon, Bertille; Sahai, Aisha; Le Goff, Kevin (2017). "My Brain is Out of the Loop: A Neuroergonomic Approach of OOTL Phenomenon" . Augmented Cognition. Neurocognition and Machine Learning . Lecture Notes in Computer Science. Vol. 10284. Springer International Publishing. pp. 3– 18. doi :10.1007/978-3-319-58628-1_1 . ISBN 978-3-319-58627-4 .
^ Wang, Aobo; Guo, Beiyuan; Du, Hao; Bao, Haifeng (2022). "Impact of Automation at Different Cognitive Stages on High-Speed Train Driving Performance" . IEEE Transactions on Intelligent Transportation Systems . 23 (12): 24599– 24608. doi :10.1109/TITS.2022.3211709 . ISSN 1558-0016 . S2CID 253325209 .