RfX: A Design Study for the Interactive Exploration of a Random Forest to Enhance Testing Procedures for Electrical Engines

Faculty/Professorship: Cognitive Systems  
Author(s): Eirich, Joscha ; Münch, M.; Jäckle, D.; Sedlmair, M.; Bonart, J.; Schreck, Tobias
Title of the Journal: Computer Graphics Forum
ISSN: 1467-8659, 0167-7055
Publisher Information: Oxford : Blackwell
Year of publication: 2022
Volume: 41
Issue: 6
Pages: 302-315
Language(s): English
DOI: 10.1111/cgf.14452
Random Forests (RFs) are a machine learning (ML) technique widely used across industries. The interpretation of a given RF usually relies on the analysis of statistical values and is often only possible for data analytics experts. To make RFs accessible to experts with no data analytics background, we present RfX, a Visual Analytics (VA) system for the analysis of a RF's decision-making process. RfX allows to interactively analyse the properties of a forest and to explore and compare multiple trees in a RF. Thus, its users can identify relationships within a RF's feature subspace and detect hidden patterns in the model's underlying data. We contribute a design study in collaboration with an automotive company. A formative evaluation of RFX was carried out with two domain experts and a summative evaluation in the form of a field study with five domain experts. In this context, new hidden patterns such as increased eccentricities in an engine's rotor by observing secondary excitations of its bearings were detected using analyses made with RfX. Rules derived from analyses with the system led to a change in the company's testing procedures for electrical engines, which resulted in 80% reduced testing time for over 30% of all components.
GND Keywords: Mensch-Maschine-Schnittstelle; Interaktion; Visuelle Prüfung; Visualisierung
Keywords: human–computer interfaces, interaction, visual analytics, visualization
DDC Classification: 004 Computer science  
RVK Classification: ST 300   
Peer Reviewed: Ja
International Distribution: Ja
Type: Article
URI: https://fis.uni-bamberg.de/handle/uniba/55971
Release Date: 14. October 2022
Project: Open-Access-Publikationskosten 2022 - 2024