Unveiling the implicit knowledge, one scenario at a time
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ORIGINAL ARTICLE
Unveiling the implicit knowledge, one scenario at a time Flavien Lécuyer1 Bruno Arnaldi1
· Valérie Gouranton1 · Aurélien Lamercerie3 · Adrien Reuzeau1 · Benoît Caillaud2 ·
© Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract When defining virtual reality applications with complex procedures, such as medical operations or mechanical assembly or maintenance procedures, the complexity and the variability of the procedures make the definition of the scenario difficult and time-consuming. Indeed, the variability complicates the definition of the scenario by the experts, and its combinatorics demand a comprehension effort for the developer, which is often out of reach. Additionally, the experts have a hard time explaining the procedures with a sufficient level of details, as they usually forget to mention some actions that are, in fact, important for the application. To ease the creation of scenario, we propose a complete methodology, based on (1) an iterative process composed of: (2) the recording of actions in virtual reality to create sequences of actions and (3) the use of mathematical tools that can generate a complete scenario from a few of those sequences, with (4) graphical visualization of the scenarios and complexity indicators. This process helps the expert to determine the sequences that must be recorded to obtain a scenario with the required variability. Keywords Virtual reality · Scenario · Generalization · Authoring
1 Introduction To translate complex procedures into scenarios for virtual reality (VR) applications, the variability of those procedures complicates the task for the developers. For instance, procedures with more than 1000 steps and with 10 or more acceptable ways of completing the task are extremely difficult to translate into scenarios. Indeed, complex and variable procedures are difficult to formalize for the expert, because their explanations contain implicit details that must, in fact, be explicitly described for the developer. They are also difficult for the developer to create, because they take time to understand and to write.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00371-020-01904-7) contains supplementary material, which is available to authorized users.
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We propose a novel method for the creation of VR scenarios that aims to facilitate the expression of complex procedures. This methodology is based on an (1) incremental process including: (2) the recording in VR of an expert, as well as the use of (3) the use of mathematical tools to merge and generalize the observations to synthesize a complete scenario, capturing the complexity of the procedures. This complexity is also represented with (4) a graphic visualization and indicators. In this paper, after the related works in Sect. 2, we describe the solution in Sect. 3, through the example of an automotive wheel replacement procedure, in which the order of the nuts to tighten is important. Finally, we illustrate the method with a use case
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