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implementation, but in detail the number of clicks
needed to fulfill the tasks has to be reduced.
One driving factor throughout implementation
was to aim for genericity. This contributed to the ben-
efit of the current system being applicable in a wide
array of use cases. While desirable for developing
our application, some of the valued flexibility needs
to be toned down to enter a testing phase. Especially
considering that such a generic approach gives way
to plenty related problems, such as volatility of stan-
dards or frameworks, or the closed shop mentality of
many wearable device distributors.
A first measure of toning down flexibility will be
to settle for a selection of vital data points relevant
to the use case of oncology, selecting appropriate sen-
sor types for measuring said data points, and choosing
devices that offer the required services. The selection
of appropriate sensors, or rather devices, presents a
somewhat harder challenge. In addition to technical
requirements, user acceptance is crucial for the suc-
cess of both testing and operation of the project, in-
cluding factors such as comfort, ease of use, aesthet-
ics, or even brand loyalty.
As expected in the current stage of development,
some additional questions remain open, and some de-
cisions may be overthrown in the future. For exam-
ple, the mobile application for patients currently stops
sending data once the user closes the application on
their phone. While this is an easy way to give control
to the patient, this design decision may deviate from
the user’s assumption of the app, or create a conflict
between the wish to keep the list of opened applica-
tions tidy while still passively sending out data. There
are several alternate approaches, each of which needs
to be checked with user compliance. While the func-
tionality and basic structure of the bwHealthApp is
clear and functioning it is not evaluated if and how
the system is accepted in the field. In a subsequent
study the usability and overall practicability of the
presented approach will be examined.
ACKNOWLEDGEMENTS
This project is funded by the ministry of social affairs
and integration, state Baden-W
¨
urttemberg, Germany.
The authors declare that they have no competing in-
terests.
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