Tim Rietz

Karlsruhe Institute of Technology | KIT · Institute of Information Systems and Marketing

Information technology is rapidly changing the way how people collaborate in enterprises. Chatbots integrated into enterprise collaboration systems can strengthen collaboration culture and help reduce work overload. In light of a growing usage of chatbots in enterprise collaboration systems, we examine the influence of anthropomorphic and functiona...

[Context] Digital transformation impacts an ever-increasing amount of everyone's business and private life. It is imperative to incorporate user requirements in the development process to design successful information systems (IS). Hence, requirements elicitation (RE) is increasingly performed by users that are novices at contributing requirements...

User feedback on mobile app stores, product forums, and on social media can contain product development insights. There has been a lot of recent research studying this feedback and developing methods to automatically extract requirement-related information. This feedback is generally considered to be the "voice of the users"; however, only a subset...

Coding is an important process in qualitative research. However, qualitative coding is highly time-consuming even for small datasets. To accelerate this process, qualitative coding systems increasingly utilize machine learning (ML) to automatically recommend codes. Existing literature on ML-assisted coding reveals two major issues: (1) ML model tra...

Qualitative research can produce a rich understanding of a phenomenon but requires an essential and strenuous data annotation process known as coding. Coding can be repetitive and time-consuming, particularly for large datasets. Existing AI-based approaches for partially automating coding, like supervised machine learning (ML) or explicit knowledge...

In user research, laddering interviews are particularly helpful in eliciting goals and underlying values. However, laddering interviews do not scale due to being time and training intensive. In this study, we propose and evaluate Ladderbot, a text-based conversational agent (CA) capable of facilitating human-like online laddering interviews. Ladder...

Many software users give feedback online about the applications they use. This feedback often contains valuable requirements information that can be used to guide the effective maintenance and evolution of a software product. Yet, not all software users give online feedback. If the demographics of a user-base aren’t fairly represented, there is a d...

While qualitative research can produce a rich understanding of peoples’ mind, it requires an essential and strenuous data annotation process known as coding. Coding can be repetitive and timeconsuming, particularly for large datasets. Crowdsourcing provides flexible access toworkers all around theworld, however, researchers remain doubtful about it...

Qualitative coding, the process of assigning labels to text as part of qualitative analysis, is time-consuming and repetitive, especially for large datasets. While available QDAS sometimes allows the semi-automated extension of annotations to unseen data, recent user studies revealed critical issues. In particular , the integration of automated cod...

Information systems development is driven by a variety of stakeholders – each with specific requirements. Modern agile development methods, like Scrum, allocate the vital step of prioritizing requirements to dedicated roles like the product owner. However, this can create a bottleneck and may lead to misunderstandings and conflicts between stakehol...

Non-profit sport organizations fulfill an important role in society but face various problems regarding the attraction, retention and management of members and volunteers. Digitalization in the form of platform-based software ecosystems is a promising alternative to costly tailor-made or inflexible standard-software. Such ecosystems for sport organ...

[Context] Digital transformation impacts an ever-increasing degree of everyone’s business and private life. It is imperative to incorporate a wide audience of user requirements in the development process to design successful information systems (IS). Hence, requirements elicitation (RE) is increasingly performed by end-users that are novices at con...