Publications de Blagovesta Hristova Kostova

A Theory of Value for Service Ecosystems

In this thesis, we present a theory of value for the design and analysis of service ecosystems. The theory is based on general systems thinking. The concept of a system is used for relating knowledge from different disciplines (such as software engineering ...

EPFL2022

EVA: An Encrypted Vector Arithmetic Language and Compiler for Efficient Homomorphic Computation

Blagovesta Hristova Kostova, Wei Dai

Fully-Homomorphic Encryption (FHE) offers powerful capabilities by enabling secure offloading of both storage and computation, and recent innovations in schemes and implementations have made it all the more attractive. At the same time, FHE is notoriously ...

ASSOC COMPUTING MACHINERY2020

Requirements Elicitation with a Service Canvas for Packaged Enterprise Systems

Alain Wegmann, Gil Regev, Blagovesta Hristova Kostova, Lucien Alexandre Etzlinger

We present a technique for eliciting requirements based on the use of a service canvas and the results of its application in the early phase of a customer relationship management integration project. The project was a collaboration between a research group ...

IEEE2019

Service-Oriented Business Design for IT Students

Alain Wegmann, Blagovesta Hristova Kostova

In this Full Innovative Practice Paper, we present a teaching approach, based on service science, for integrating a business curriculum in the engineering educational program. Our approach is a composition of experiential learning, systems thinking, and se ...

2019

Comparison of Two Value-Modeling Methods: e3 value and SEAM

Alain Wegmann, Gil Regev, Blagovesta Hristova Kostova

In the last few decades, several value-modeling methods have emerged in requirements engineering for IS research. We compare two value-modeling methods, e3value and SEAM. We illustrate their use with an example of the exchange of the Intellectual Property ...

IEEE2019

Service-Oriented Business Design for IT students

Alain Wegmann, Blagovesta Hristova Kostova

In this Full Innovative Practice Paper, we present a teaching approach, based on service science, for integrating a business curriculum in the engineering educational program. Our approach is a composition of experiential learning, systems thinking, and se ...

IEEE2018

Technology-Transfer Requirements Engineering (TTRE) – on the Value of Conceptualizing Alternatives

Alain Wegmann, Blagovesta Hristova Kostova

In this paper, we describe a requirements engineering methodwith a focus on the conceptualization of alternative service offerings. Thepractical context for our project is based on the first author’s work in astartup. Our proposed method is suitable for ex ...

Springer, Cham2018

Co-Design of Business and IT Services – a Tool-Supported Approach

Alain Wegmann, Blagovesta Hristova Kostova, Natalia Nessler

Service modeling is an important step in designing service-oriented systems. There are multiple levels of design because service sci-ence includes both the business rationale and the IT implementation ofthe services. As business and IT perspectives differ, ...

2018

Teaching Business Design at an Engineering School–Principles/Patterns/Practice

Alain Wegmann, Gorica Tapandjieva Sekulovska, Blagovesta Hristova Kostova

We present a research-in-progress project on teaching business design at an engineering school. We describe our teaching approach based on experiential learning, systems thinking and service-dominant logic. We highlight how we try, by repetition, to help t ...

ISPIM2017

A Proposition for a Design Method of Service Systems

Blagovesta Hristova Kostova

This research is in the domain of service science and proposes a method for designing service systems. We consider three levels of design – individual, organizational, and implementation. The proposed design method links these three levels by explicit inpu ...

2017