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In several domains of product design - like medical device design -
risk related use scenarios have to be analyzed in an early stage of design process.
Virtual reviews with users make it possible to get early insights in use problems.
Also, situations that are difficult to imitate in reality can be modeled and simulated
in virtual reality without risking the health of user. Therefore, virtual usability
tests are a promising approach which allow testing different scenarios under
controlled conditions. We chose a sample scenario from medical device design
and compare and evaluate different technical systems which can be used for virtual
usability tests. Aim is to derive guidance for virtual usability tests including
systems that can be used for specific conditions and the qualitative and quantitative
data, which can be collected with these systems. A formative test is performed
to evaluate and compare different systems. Also, a summative test is performed
to evaluate the selected systems. Results show that virtual usability tests
make it possible to test scenarios with users in an early stage and thus to encounter
possible interaction problems. But there are also many additional and new
things to consider compared to normal usability tests, such as checking motion
sickness, maintaining presence and the extensive operation of the technology.
Finally, a proposed method for virtual usability testing is described which also
comprises our equipment recommendations for virtual usability tests.
New product development is essential for a company to grow and sustain itself. Usability testing is a crucial part of the new product development process, and it helps reduce product uncertainty and market failure. There are many methods available and they vary depending on the product development phase. This thesis focuses on methods used in the deployment phase, which is the final stage before mass production. The methods used differ subjecting to different customers.
A number of studies have suggested that marketing and sales should vary when the nature of customer differs. However, only a few studies focus on how the nature of customer influences new product testing. This research compares the involvement of B2B and B2C customers during the product innovation testing phase.
The comparison has been subcategorised into four smaller hypotheses. First, the methodologies used, such as virtual prototype testing, field testing, lab usability testing, and more, are discussed whether companies use them differently according to customers' nature. Second, the process of identifying and recruiting testers is examined. Third, testers' qualification is analysed, whether participants are ordinary users or professionals or companies prefer a mixture of both. Last, the sample size, which is simply the amount of testers who participated in the usability test.