Demystifying a Dark Art: Understanding Real-World Machine Learning Model Development

• URL: http://arxiv.org/abs/2005.01520v1
• Date: Mon, 4 May 2020 14:33:39 GMT
• Title: Demystifying a Dark Art: Understanding Real-World Machine Learning Model Development
• Authors: Angela Lee, Doris Xin, Doris Lee, Aditya Parameswaran
• Abstract summary: We analyze over 475k user-generated on OpenML, an open-source platform for tracking and sharing machine learning. We find that users often adopt a manual, automated, or mixed approach when iterating on their iterations.
• Score: 2.422369741135428
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: It is well-known that the process of developing machine learning (ML) workflows is a dark-art; even experts struggle to find an optimal workflow leading to a high accuracy model. Users currently rely on empirical trial-and-error to obtain their own set of battle-tested guidelines to inform their modeling decisions. In this study, we aim to demystify this dark art by understanding how people iterate on ML workflows in practice. We analyze over 475k user-generated workflows on OpenML, an open-source platform for tracking and sharing ML workflows. We find that users often adopt a manual, automated, or mixed approach when iterating on their workflows. We observe that manual approaches result in fewer wasted iterations compared to automated approaches. Yet, automated approaches often involve more preprocessing and hyperparameter options explored, resulting in higher performance overall--suggesting potential benefits for a human-in-the-loop ML system that appropriately recommends a clever combination of the two strategies.

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