2012

Beimborn, D., Joachim, N., and Weitzel, T. (2012)
Do Service-Oriented IT Architectures facilitate Business Process Outsourcing? A Study in the German Service Industry
Journal of Business Economics (JBE) (82:4), p. 77-108

View Abstract
How does a firm's IT architecture affect its potential to outsource business processes? As Information Technology (IT) has become many firms' essential operational infrastructure or "backbone", we are interested in scrutinizing to what extent the kind of IT architecture affects a firm's boundaries or the plasticity of its boundaries. Focusing on the particular concept of service-oriented architectures (SOA), we concretely ask: How does SOA affect business process outsourcing potentials? Since SOA is widely expected to modularize the IT implementation of business processes, it should increase business process outsourcing (BPO) in terms of buying in the provision of single business functionalities. We develop and empirically evaluate a theoretical model that conceptualizes the relationship between SOA and BPO. Questionnaire data from 115 firms give first evidence that SOA facilitates BPO. By increasing IT modularity, SOA supports BPO by increasing sourcing flexibility and, in particular, operational benefits, while at the same time lowering financial risks and strategic risks, such as lock-in. Overall, however, firms see SOA-based BPO mainly in an operational context with low hidden costs and little strategic benefits.

2011

Joachim, N., Beimborn, D., and Weitzel, T. (2011)
An Instrument for Measuring SOA Maturity
Proceedings of the 32nd International Conference on Information Systems (ICIS), Shanghai, China
(Research in Progress)

View Abstract
Existing empirical research on the business value of Service-Oriented Architectures (SOA) has only measured the extent of SOA adoption - but not maturity - to determine whether typical goals, like increased business agility or IT cost reduction, could be achieved. However, a widely implemented SOA might be less mature than an SOA adopted only in particular areas of the organization, which in turn can lead to mismeasurement and misinterpretation. On the other side, the few existing SOA maturity frameworks that have been specified by previous researchers lack valid operationalizations to make them applicable to empirical research. Ready to use items and scales for evaluating the particular maturity level of an organization are missing. We propose to measure the degree of SOA maturity as a new variable for future empirical research especially in the context of SOA business value. Our analytical approach uses 21 items to classify the maturity of an organization's SOA in seven maturity levels along seven maturity dimensions derived from The Open Group Service Integration Maturity Model (OSIMM). The applicability of this new instrument is shown using data from 121 organizations. The results show that the majority of the organizations has only reached SOA maturity levels two to four. Also, higher levels of SOA maturity highly and significantly increase the realized business value from SOA in terms of business agility, straight through processing (STP), and reduced IT costs. However, the marginal benefits are decreasing for higher levels of SOA maturity in cases of STP and business agility.

Joachim, N., Beimborn, D., Schlosser, F., and Weitzel, T. (2011)
Does SOA Create or Require IT/Business Collaboration? Investigating SOA's Potential to Reduce the Gap Between IT and Business
Proceedings of the 32nd International Conference on Information Systems (ICIS), Shanghai, China

View Abstract
By extending the research on identifying the possible benefits of Service-Oriented Architectures (SOA), we investigate how SOA delivers its value in an organization. One perspective in the existing literature suggests that service orientation works through creating better IT/Business collaboration as the "services" concept is a shared mental model that reduces the mental gap between IT and business units. Another perspective proposes that SOA benefits require IT/Business collaboration in the first place as IT and business must closely collaborate in order to leverage SOA's potential. We develop a theoretical model to understand how service orientation and close collaboration between IT and business departments are related. An analysis using data from 122 organizations reveals that SOA does not advance - but rather requires - close collaboration between the IT and business departments (i.e., collaboration is a moderator, not mediator, between SOA and its impacts). Therefore, close IT/business collaboration is an important success factor for realizing SOA's value potential and must be established using other means.

Joachim, N. (2011)
A Literature Review of Research on Service-Oriented Architectures (SOA): Characteristics, Adoption Determinants, Governance Mechanisms, and Business Impact
Proceedings of the 17th Americas Conference on Information Systems (AMCIS), Detroit (MI)

View Abstract
This literature review synthesizes existing research in the field of Service-Oriented Architectures (SOA) from a business perspective and integrates results from 40 works to offer researchers an overview about the existing body of knowledge in this research field as well as a research agenda, which unifies and extends previous efforts. While the literature regarding the technologies and design principles for SOA and even Service-Oriented Enterprises (SOE) converges, especially research regarding the identification of determinants influencing SOA adoption, governance mechanisms for effectively implementing SOA, and regarding SOA's actual business impact is needed. Previous empirical research indicated promising factors in each of these fields. However, future research should especially draw attention to holistically cover each of the research areas. Moreover, extending the use of empirical research methods will further improve our understanding regarding the importance of different adoption determinants, governance mechanisms, and the actual business value of SOA.

Joachim, N., Beimborn, D., and Weitzel, T. (2011)
SOA-Governance für effektive serviceorientierte Architekturen - Eine empirische Studie in der deutschen Dienstleistungswirtschaft
Proceedings of the 10. International Conference on Wirtschaftsinformatik , Zürich, Schweiz

View Abstract
Sowohl die jüngere Forschung als auch die Erfahrung von Praktikern postulieren, dass eine SOA-Governance kritisch für eine erfolgreiche Implementierung von serviceorientierten Architekturen (SOA) ist. Dieser Beitrag bietet eine der ersten empirischen Untersuchungen bezüglich der Bedeutung verschiedener SOA-Governance-Mechanismen (Schaffung von Entscheidungsstrukturen, Nutzung von Standards, Verwendung von Servicemanagement- und Serviceentwicklungsprozessen, Qualifikation von Mit-arbeitern und Zusammenarbeit von Fachbereichen) für das Erreichen der gewünschten Modularität und einer hohen Wiederverwendungsrate. Die Ergebnisse basieren auf einer Umfrage unter deutschen Dienstleistungsunternehmen und zeigen, dass eine höhere Wiederverwendung nicht nur direkt durch verschiedene SOA-Governance-Mechanismen, sondern vor allem auch durch eine geeignetere Modularität als Mediator erreicht wird. Außerdem ist die Verwendung bestehender Entscheidungsstrukturen gegenüber der Schaffung neuer Entscheidungsstrukturen in Bezug auf die Erreichung von Modularität und Wiederverwendung zu favorisieren. Zuletzt wird ein starker Einfluss der Verwendung von Standards und klar definierter Servicemanagementprozesse auf die Effektivität von SOA deutlich.

Joachim, N., Beimborn, D., and Weitzel, T. (2011)
Eine empirische Untersuchung des Wertbeitrages von serviceorientierten Architekturen (SOA)
Proceedings of the 10. International Conference on Wirtschaftsinformatik , Zürich, Schweiz

View Abstract
Bisher wurde der Wertbeitrag der Nutzung von serviceorientierten Architekturen (SOA) für Unternehmen weder in der Praxis noch in der Forschung jenseits von Einzelfallbetrachtungen nachgewiesen. Wir untersuchen in einer ersten quantitativen Studie die realisierten Vorteile einer SOA-Nutzung im Hinblick auf Kostenreduktion, unternehmerische Agilität, Datenqualität, Prozess-Monitoring, interne Geschäftsprozessintegration (STP) und unternehmensübergreifende Integration (B2B). Die Analyse von 134 Unternehmensantworten zeigt, dass SOA zu allen sechs Unternehmensvorteilen beiträgt. Außerdem ist erkennbar, dass sich SOA in klassischen Aspekten flexibler IT-Infrastrukturen wie Modularität, Flexibilität und Skalierbarkeit widerspiegelt. Und auch die Realisierung von Unternehmensvorteilen durch SOA kann zu bedeutenden Teilen über die Verbesserung der IT-Flexibilität als Mediator erklärt werden.

Joachim, N., Beimborn, D., and Weitzel, T. (2011)
What Are Important Governance and Management Mechanisms to Achieve IT Flexibility in Service-Oriented Architectures (SOA)? An Empirical Exploration
Proceedings of the 44th Hawaii International Conference on System Sciences (HICSS), Kauai (HI)

View Abstract
Recent research results and practitioner experience both posit that Service-Oriented Architecture (SOA) governance is critical to successfully implement and utilize SOA. We investigate the impact of different SOA governance and management mechanisms (structures, processes, and employees) for leveraging SOA's potential to increase an organization's IT infrastructure flexibility. The results based on data from 73 SOA using organizations reveal: (1) a negative impact of implementing new decision-making bodies on 2 dimensions of IT flexibility (IT modularity and integration) (2) a positive impact of the SOA management processes service management and service development on 2 dimensions of IT flexibility (modularity and integration of IT infrastructure) (3) a positive impact of business units collaboratively identifying jointly utilizable services on modularity (4) and a particularly strong impact of standards, and also of employee qualification, on all dimensions of IT infrastructure flexibility.

Beimborn, D. and Joachim, N. (2011)
The Joint Impact of Service-Oriented Architectures and Business Process Management on Business Process Quality: An Empirical Evaluation and Comparison
Information Systems and e-Business Management (9:3), p. 333-362, http://dx.doi.org/10.1007/s10257-010-0129-1

View Abstract
What is the interplay between Business Process Management (BPM) and Service-Oriented Architecture (SOA) in achieving high business process quality? In this paper, we empirically investigate the impact of both SOA and BPM on business process quality in terms of straight-through processing (STP), business-to-business integration, quality control, as well as standardization and consolidation of business processes. For the empirical evaluation of our model, we use the data of 157 German service firms. The results show that the SOA paradigm has still received rather low adoption rates in the industry. However, SOA, BPM, and related information technologies have a direct positive impact on business process quality and the analysis provides evidence for the complementarities of BPM and SOA since interaction effects between them have an additional significant impact on business process quality. Consequently, firms having adopted SOA can more effectively apply BPM.

Beimborn, D., Joachim, N., and Schlosser, F. (2011)
The Role of SOA for BPO Intention - Proposing a Research Model
In: Raj Sharman, H. Raghav Rao, T. S. Raghu (Eds.): Exploring the Grand Challenges for Next Generation E-Business, Lecture Notes in Business Information Processing, Springer, Berlin, 122-136

View Abstract
How does the availability of an SOA within a firm affect the potential of and intention for outsourcing business activities? Since one of the promises of SOA is to modularize the IT representation of business processes, it should facilitate business process outsourcing in terms of buying the provision of single business functionalities. In this paper, we develop a conceptual research model that theorizes the relationship between SOA and BPO intention.

2010

Weitzel, T., König, W., Beimborn, D., Joachim, N., and Schlosser, F. (2010)
Die Bedeutung serviceorientierter Architekturen für den Unternehmenserfolg: Eine wissenschaftliche Erhebung in der deutschen Dienstleistungswirtschaft
Research Report, E-Finance Lab der Goethe Universität Frankfurt am Main und Otto-Friedrich-Universität Bamberg

Joachim, N., Beimborn, D., and Weitzel, T. (2010)
Investigating Adoption Determinants of Service-oriented Architectures (SOA)
Proceedings of the 2010 Special Interest Group on Services (SIGSVC) (Pre-ICIS Workshop), St. Louis (MO)
(Research in Progress)

2009

Joachim, N., Beimborn, D., Hoberg, P., and Schlosser, F. (2009)
Examining the Organizational Decision to Adopt Service-Oriented Architecture (SOA) - Development of a Research Model
Proceedings of the 2009 Special Interest Group on Adoption and Diffusion of Information Technology (DIGIT) (Pre-ICIS Workshop), Phoenix (AZ)

View Abstract
What are the determinants of an organization's decision to adopt Service-Oriented Architecture (SOA)? Although the paradigms of service orientation and SOA have become quite omnipresent in the IS literature, research is still lacking to provide a comprehensive view upon drivers and inhibitors of the organizational decision to adopt SOA. Based on the mature strand of adoption research, this paper develops a conceptual model in order to increase the understanding of the determinants influencing this decision. Thereby, the drivers and inhibitors are distinguished in organization-specific and innovation-specific factors. The organization-specific factors cover two aspects: (1) the compatibility of technology and organization (i.e., SOA expertise of the employees, management support for SOA, IT/ Business alignment, degree of process documentation) and (2) management fad and fashion. The innovation-specific factors cover the perceived benefits, perceived complexity, and standardization of available technologies related to SOA. Beside developing this theoretical model for laying the foundation for future empirical research, a further contribution of this paper is the development of a comprehensive measurement model for SOA adoption, which differentiates between the IT and the enterprise layer.

Beimborn, D., Joachim, N., and Schlosser, F. (2009)
The Role of SOA for BPO Intention - Proposing a Research Model
Proceedings of the Workshop on eBusiness (Pre-ICIS Workshop), Phoenix (AZ)

View Abstract
How does the availability of an SOA within a firm affect the potential of and intention for outsourcing business activities? Since one of the promises of SOA is to modularize the IT representation of business processes, it should facilitate business process outsourcing in terms of buying the provision of single business functionalities. In this paper, we develop a conceptual research model that theorizes the relationship between SOA and BPO intention.

Joachim, N. (2009)
Service-Oriented Architectures (SOA): An Empirical Investigation of Adoption Determinants and Resulting Business Value
Proceedings of the 30th International Conference on Information Systems (ICIS), Doctoral Consortium, Phoenix (AZ)

View Abstract
This research investigates the economic benefits which Service-Oriented Architectures (SOA) promise. While more and more organizations adopt SOA, virtually none of them is able to predict the realizable business value of SOA ex ante. In contrast to the mature literature on the technological aspects of SOA, the organizational impacts of SOA are not explored in detail in the academic literature yet. Consequently, this proposal addresses two problems identified in current SOA research: First, a SOA adoption model is developed to evaluate the determinants of an organization's decision to adopt SOA. Second, a research model for enhancing the understanding of SOA's business value is developed. The first part of the proposal will draw on the technology-organization-environment (TOE) framework in order to increase the knowledge about the dissimilar impacts of different determinants which influence an organization's decision concerning the adoption of SOA. To address the second part of this research proposal, the model regarding the business value of SOA is based on the dynamic capabilities theory. Comparing organizations, which have adopted SOA with varying degree with others which have not adopted SOA at all, allows to determine the realistic economic impacts of SOA on an organization. Moreover, the business value model further investigates IT flexibility and IT business alignment as promising mediating factors which support the actual realization of SOA's potential business value.

Beimborn, D. and Joachim, N. (2009)
Proposing the Relationship between IT Business Alignment and the Business Value of Service-Oriented Architectures in Financial Firms
In: D. Kundisch, D. J. Veit, T. Weitzel, and C. Weinhardt (eds.): Enterprise Applications and Services in the Finance Industry, Lecture Notes in Business Information Processing, Springer, Berlin, 78-93

View Abstract
What is the business value of Service-Oriented Architectures (SOA) and how can we achieve it? This paper represents a conceptual piece of research which focuses on the impact of IT Business Alignment (ITBA) on the successful implementation of SOA, in terms of its business value. The contribution of this model is predominant in proposing a threefold effect of ITBA on achieving a successful implementation of SOA through the specific strategic needs defined by a particular firm in a specific industry, i.e., the banking industry. As a result, we show that the business strategy moderates the impact of SOA's general potentials on its actual business value and claim that this relationship is further moderated by ITBA, which must be thoroughly considered by practitioners deciding on introducing SOA in their firm.

Beimborn, D., Joachim, N., Schlosser, F., and Streicher, B. (2009)
The Role of IT/Business Alignment for Achieving SOA Business Value - Proposing a Research Model
Proceedings of the 15th Americas Conference on Information Systems (AMCIS), San Francisco (CA)

View Abstract
What is the interplay between IT/Business alignment and Service-oriented Architecture (SOA) regarding the achievement of business value in terms of business flexibility? This paper introduces a conceptual model that derives propositions about how IT/Business alignment, IT flexibility, and business flexibility are interrelated and how SOA and alignment interact in order to increase business flexibility. We apply and integrate well-known multi-dimensional concepts of both IT/Business alignment (in terms of strategic alignment, structural alignment, and social alignment) and IT flexibility (technical and non-technical IT flexibility) and map the conceptual components of SOA (architectural and the governance dimension) to this resulting model. This conceptualization will allow for more profoundly structured research on how SOA contributes to business value.

Beimborn, D., Joachim, N., and Münstermann, B. (2009)
Impact of Service-oriented Architectures (SOA) on Business Process Standardization - Proposing a Research Model
Proceedings of the 17th European Conference on Information Systems (ECIS), Verona, Italy

View Abstract
What is the impact of a Service-oriented Architecture (SOA) on the efficiency and effectiveness of business process standardization (BPS)? The contribution of this paper is the development of a research model around the impact of SOA on BPS in terms of achieving fundamental efficiency and flexibility potentials while covering both the business layer and the IT layer of the firm. Drawing on an accepted and widespread enterprise architecture model, we derive propositions that explain why and how SOA's characteristics help to standardize business processes and how the interplay between SOA and BPS leads to an increased overall business value. Additional moderator arguments, such as the level of service granularity, the centrality of SOA governance, or Business IT alignment, are added to the research model as critical success factors of achieving business value of SOA.

2008

Beimborn, D. and Joachim, N. (2008)
Proposing the Relationship Between IT Business Alignment and the Business Value of Service-Oriented Architectures in Financial Firms
Proceedings of the 4th International Workshop on Enterprise Applications and Services in Finance Industry (FinanceCom) (Pre-ICIS Workshop), Paris, France

View Abstract
What is the business value of Service-Oriented Architectures (SOA) and how can we achieve it? This paper represents a conceptual piece of research which focuses on the impact of IT Business Alignment (ITBA) on the successful implementation of SOA, in terms of its business value. The contribution of this model is predominant in proposing a threefold effect of ITBA on achieving a successful implementation of SOA through the specific strategic needs defined by a particular firm in a specific industry, i.e., the banking industry. As a result, we show that the business strategy moderates the impact of SOA?s general potentials on its actual business value and claim that this relationship is further moderated by ITBA, which must be thoroughly considered by practitioners deciding on introducing SOA in their firm.

Beimborn, D. and Joachim, N. (2008)
How to Achieve Business Value of SOA? - Investigating the Relationships between SOA, IT Business Alignment and Sourcing Strategies
Proceedings of the 2008 Special Interest Group on Services (SIGSVC) (Pre-ICIS Workshop), Paris, France

View Abstract
Although many firms have started or accomplished to migrate their IT infrastructure towards a ser-vice-oriented architecture (SOA), as flexible and adaptive fundament of their business applications, there is still a gap answering one of the most essential questions associated with this new architecture para-digm: What is the business value of SOA and how can we influence it?

Beimborn, D., Joachim, N., and Weitzel, T. (2008)
Drivers and Inhibitors of SOA Business Value - Conceptualizing a Research Model
Proceedings of the 14th Americas Conference on Information Systems (AMCIS), Toronto, Canada

View Abstract
What is the business value of Service Oriented Architecture? Although the SOA paradigm has become quite evident in IS literature, a comprehensive model of the SOA business value is still lacking. Based on a literature review and on a multitheoretical foundation, drawing on the adoption of innovations literature and on the resource-based view as well as on resource dependency theory, we attempt to develop a research model which captures the business value of SOA, applicable to empirical research in subsequent studies.

2007

Beimborn, D., Joachim, N., and Weitzel, T. (2007)
Proposing an Instrument for Evaluating the Business Value of Service-Oriented Architectures
Proceedings of the 3rd International Workshop on Enterprise Applications and Services in Finance Industry (FinanceCom) (Pre-ICIS Workshop), Montreal (QC), Canada

View Abstract
This paper presents a framework assisting managers in their decision making about introducing a service-oriented architecture (SOA). The benefits, risks and efforts associated with SOA are discussed from a business value perspective. The paper contributes to the literature by suggesting a unified foundation for the debate on the business value of SOA by proposing concrete value drivers and their interrelations.