eHealth domain. This makes Rhasspy the best CT
choice to create a voice assistant focused on working
with critical health data.
Nevertheless, criteria like “Ease of installation”
(U1), “Extensibility” (U2) and “Number of applica-
tions” (T5) show the downside of Rhasspy. Here, it is
clearly outperformed by Alexa and Google Assistant.
However, since the functionality and the functioning
of these technologies are constantly changing, it is
necessary to carry out regular re-evaluations.
The research presented in this paper was carried
out as part of the AYUDO project (FFG Projektdaten-
bank, 2020), which is intended to help the elderly im-
proving or preserving their health using a CUI. Be-
yond that project the criteria can also form a basis for
the evaluation of CTs to be used in other application
domains. Here, some specific criteria will have to be
added to the existing categories, and/or the weight of
single criteria has to be adapted to the requirements
of the application domain.
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