Requirements Engineering for Product Service Systems - A State of the Art Analysis

In recent years, manufacturing companies and service providers have moved towards offering customer-specific problem solutions. These integrated bundles usually consist of hardware, software, and service components and are called product service systems (PSS) or hybrid products. Since the success of the resulting solution depends on the understanding of all requirements, requirements engineering (RE) has become a key factor. The article analyzes the state of the art of RE for PSS based on an extensive literature review in the domains of product-, software-, and service engineering. For this, criteria are derived from the characteristics of PSS and from the task area of RE in the life cycle of PSS. Based on these criteria we analyze the most established RE approaches for their suitability for PSS. An important finding is that integrated/interdisciplinary approaches for RE are missing. Moreover, the maturity of RE approaches in the three domains varies significantly. All analyzed approaches heavily rely on concepts and solution characteristics of their own domain so that a transfer to other domains is hardly possible. This literature review lays the foundation for successful RE for PSS and especially for future research aiming at combining and integrating RE approaches and models of product-, software-, and service engineering. Such requirement models could connect concepts of single domains and enable an integrated and seamless RE for PSS

REQUIREMENTS ENGINEERING FOR HYBRID PRODUCTS AS BUNDLES OF HARDWARE, SOFTWARE AND SERVICE ELEMENTS – A LITERATURE REVIEW

In this paper we compare different approaches and show the need for systematic requirements engineering for hybrid products beyond disciplinary boundaries. Hybrid products consist of combinations of hardware, software and service elements. The purpose of this paper is to report on a literature review on requirements engineering for hybrid products. Each academic discipline involved (software engineering, product engineering and service engineering) has a different view on requirements engineering. The goal of the literature review is to discover how the approaches of each discipline are able to cope with requirements engineering for hybrid products

DEVELOPING A RISK MANAGEMENT PROCESS AND RISK TAXONOMY FOR MEDIUM-SIZED IT SOLUTION PROVIDERS

To differentiate from competitors, some organizations are transforming their business models from offering single products or services to providing IT solutions. In an IT solution, the provider and the customer co-operate in integrating hardware, software and service components to fulfil customer-specific needs. The new business model, however, presents new risk management challenges. First, IT solution providers need to understand additional risks of IT solutions, e.g., risks engendered by operating the IT solution on behalf of the customer and by integrating modules from third-party providers. Second, risk management must account for special IT solution characteristics, e.g., supporting the whole lifecycle from planning to end-of-life and accounting for customer-specific risk profiles. In this paper, we present the results of our design science research with a medium-sized IT solution provider. We developed two artifacts. First, we cooperatively developed a risk management process that could be generalized to other solution providers of similar size. Second, we derived a taxonomy of IT solution risks to provide a foundation for the risk management process. We describe the process by which our research partner transformed the risk management and discuss implications for medium-sized IT solution providers

Towards an Artifact Model for Requirements to IT-enabled Product Service Systems

The development of IT-enabled product service systems (PSS) – a combination of physical technological elements (products) and service elements – poses various challenges because of their complexity and the involvement of multiple domains. Classical requirements engineering (RE) addresses these problems only insufficiently. This paper proposes an artifact model for the requirements to PSS, which helps in overcoming these problems. The results generated by RE or the development activities are called artifacts. The artifact model defines different types of artifacts and their interrelations. This provides a structure which facilitates the handling of a large number of requirements. The applicability of the presented artifact model is demonstrated in an example where the artifact model is applied to a real-life product. We show that the requirements can be modeled using the artifact model, and that common problems of RE can be avoided in this way

The Role of Adolescent Development in Social Networking Site Use: Theory and Evidence

Using survey data collected from 260 children, adolescents, and young adults between the ages of 9 and 26, this paper offers evidence for a relationship between social networking site use and Imaginary Audience, a developmental variable in which adolescents believe others are thinking about them at all times. Specifically, after controlling for a number of variables, results indicate a significant, positive relationship between social networking site use and Imaginary Audience ideation. Additionally, results indicate a positive relationship between Imaginary Audience ideation and Facebook customization practices. Together, these findings provide evidence, based on Vygotskian developmental theory, for a general consideration of the role that currently available tools, in this case social networking sites, can have on development. Thus, findings implicate both the role of development on social networking site use, as well as the role of social networking site use on development. Overall, these findings have important implications for the study of media and human development, which are discussed in detail

The Role of Adolescent Development in Social Networking Site Use: Theory and Evidence

Using survey data collected from 260 children, adolescents, and young adults between the ages of 9 and 26, this paper offers evidence for a relationship between social networking site use and Imaginary Audience, a developmental variable in which adolescents believe others are thinking about them at all times. Specifically, after controlling for a number of variables, results indicate a significant, positive relationship between social networking site use and Imaginary Audience ideation. Additionally, results indicate a positive relationship between Imaginary Audience ideation and Facebook customization practices. Together, these findings provide evidence, based on Vygotskian developmental theory, for a general consideration of the role that currently available tools, in this case social networking sites, can have on development. Thus, findings implicate both the role of development on social networking site use, as well as the role of social networking site use on development. Overall, these findings have important implications for the study of media and human development, which are discussed in detail

A requirements data model for product service systems

Product service systems (PSS) are bundles of physical technological elements and service elements that are integrated to solve customer problems. In practice, most components of PSS are developed independently from each other, which leads to problems with coordination of development activities and integration of PSS components. Therefore, an integrated requirements engineering for PSS is needed that deals with the involvement of developers from product engineering, software engineering, and service engineering, as well as the inherent complexity of the PSS and the development process. In a case study with the development department of a PSS provider, we analyzed requirements documents and conducted expert interviews. We identified problems in the development, for example, that requirements on different levels of abstraction are intermingled, rationales for requirements are missing, and the concretization of requirements is unclear. To solve these problems, we propose a requirements data model (RDMod) for requirements to PSS. An RDMod describes different types of requirements and the relations between them. Thus, it is a scheme for the concretization of the requirements, which especially addresses the problems of structuring the requirements, enabling traceability, and finding conflicts. We then used an analytical evaluation, a feature-based evaluation and a retrospective application with requirements analysts of the industry partner. In a joint workshop, we specified requirements for a PSS with the RDMod. In structured interviews, we analyzed the perceived advantages of the RDMod. The experts confirmed that the RDMod is applicable in their development and it provides a clear structure for the requirements and therefore helps overcoming the identified problems