The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Wolfgang Keller - One of the best experts on this subject based on the ideXlab platform.
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the bridge to the new town a legacy system migration pattern
European Conference on Pattern Languages of Programs, 2000Co-Authors: Wolfgang KellerAbstract:Imagine you are the person responsible for the Application Portfolio of a large insurance company. For their business the company runs one monolithic system for most of its product divisions1. This system is 25 years old, written in Assembler and sits on an IMS/DB database. This is the old town. It’s at the end of it’s potential growth and people want to move out of it to the other side of the river. Let’s call this old system (or town) CLS for complete legacy system. You want to replace this system with newer systems, a new town, in a step by step
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EuroPLoP - The Bridge to the New Town - A Legacy System Migration Pattern.
2000Co-Authors: Wolfgang KellerAbstract:Imagine you are the person responsible for the Application Portfolio of a large insurance company. For their business the company runs one monolithic system for most of its product divisions1. This system is 25 years old, written in Assembler and sits on an IMS/DB database. This is the old town. It’s at the end of it’s potential growth and people want to move out of it to the other side of the river. Let’s call this old system (or town) CLS for complete legacy system. You want to replace this system with newer systems, a new town, in a step by step
Kexin Zhao - One of the best experts on this subject based on the ideXlab platform.
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ICIS - NARROW FRAMING EFFECTS ON REAL OPTIONS: THE CASE OF IT Application PortfolioS
2010Co-Authors: Sarah S. Khan, Ram L. Kumar, Moutaz J. Khouoja, Kexin ZhaoAbstract:Real options theory has been advocated as a solution to IT investment problems with uncertainty around future outcomes and the inability of traditional financial measures to account for managerial flexibility. On the one hand, it is argued that real option analysis captures and formalizes managers’ intuition, thus creating a disciplined decision making process. On the other hand, the intuitive valuation of the options is criticized due to the prevalent effects of various judgmental biases. Through this study, we try to capture one of the biases that can affect the real option value at exercise time in an IT Application Portfolio setting i.e. narrow framing. We also explore the impact of uncertainty around outcomes on real option exercise time. By conducting an online experiment using experimental choice analysis with IT managers as subjects, we try to see if they are prone to simplifying complicated real option exercise decisions by isolating them.
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NARROW FRAMING EFFECTS ON REAL OPTIONS : THE CASE OF IT Application PortfolioS Research-in-Progress
2010Co-Authors: Sarah S. Khan, Ram L. Kumar, Moutaz J. Khouoja, Kexin ZhaoAbstract:Real options theory has been advocated as a solution to IT investment problems with uncertainty around future outcomes and the inability of traditional financial measures to account for managerial flexibility. On the one hand, it is argued that real option analysis captures and formalizes managers’ intuition, thus creating a disciplined decision making process. On the other hand, the intuitive valuation of the options is criticized due to the prevalent effects of various judgmental biases. Through this study, we try to capture one of the biases that can affect the real option value at exercise time in an IT Application Portfolio setting i.e. narrow framing. We also explore the impact of uncertainty around outcomes on real option exercise time. By conducting an online experiment using experimental choice analysis with IT managers as subjects, we try to see if they are prone to simplifying complicated real option exercise decisions by isolating them.
Erik Nylén - One of the best experts on this subject based on the ideXlab platform.
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An Application Portfolio management method - for implementation at SCANIA CV AB
2012Co-Authors: Erik NylénAbstract:Information Technology (IT) has become a vital tool for most industrial businesses and Scania CV AB is no exception. As the importance of IT generally has increased, the usage and number of applica ...
Dick Quartel - One of the best experts on this subject based on the ideXlab platform.
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capturing business strategy and value in enterprise architecture to support Portfolio valuation
Enterprise Distributed Object Computing, 2012Co-Authors: Mariaeugenia Iacob, Dick Quartel, Henk JonkersAbstract:This paper investigates and enhances the suitability of the Archi Mate enterprise architecture modeling language to support the modeling of business strategy concepts and architecture-based approaches to IT Portfolio valuation. It gives an overview of existing strategy and valuation concepts and methods in the literature and motivates the need for enterprise architecture and business requirements modeling to capture these aspects as well. This overview results in the identification of strategy and value related concepts, such as value, risks, resources, capabilities, competencies and constraints. The paper provides an analysis of the extent to which Archi Mate may support some of the above-mentioned concepts and extends it with the missing concepts. The proposed language extension is formalized in terms of a met model fragment, which is aligned with the Archi Mate metamodel. The approach is also illustrated by means of an Application Portfolio consolidation case study in which we demonstrate how a constrained optimization valuation method can be applied to architecture models enhanced with the new concepts.
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Application and project Portfolio valuation using enterprise architecture and business requirements modelling
Enterprise Information Systems, 2012Co-Authors: Dick Quartel, Maarten W A Steen, Marc M LankhorstAbstract:This article describes an architecture-based approach to IT valuation. This approach offers organisations an instrument to valuate their Application and project Portfolios and to make well-balanced decisions about IT investments. The value of a software Application is assessed in terms of its contribution to a selection of business goals. Based on such assessments, the value of different Applications can be compared, and requirements for innovation, development, maintenance and phasing out can be identified. IT projects are proposed to realise the requirements. The value of each project is assessed in terms of the value it adds to one or more Applications. This value can be obtained by relating the ‘as-is’ Application Portfolio to the ‘to-be’ Portfolio that is being proposed by the project Portfolio. In this way, projects can be ranked according to their added value, given a certain selection of business goals. The approach uses ArchiMate to model the relationship between software Applications, business p...
Michele Bombardieri - One of the best experts on this subject based on the ideXlab platform.
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software aging assessment through a specialization of the square quality model
2009 ICSE Workshop on Software Quality, 2009Co-Authors: Michele Bombardieri, Francesca Arcelli FontanaAbstract:In the last years the software Application Portfolio has become a key asset for almost all companies. During their lives, Applications undergo lots of changes to add new functionalities or to refactor older ones; these changes tend to reduce the quality of the Applications themselves, causing the phenomenon known as software aging.
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WoSQ@ICSE - Software aging assessment through a specialization of the SQuaRE quality model
2009 ICSE Workshop on Software Quality, 2009Co-Authors: Michele Bombardieri, Francesca FontanaAbstract:In the last years the software Application Portfolio has become a key asset for almost all companies. During their lives, Applications undergo lots of changes to add new functionalities or to refactor older ones; these changes tend to reduce the quality of the Applications themselves, causing the phenomenon known as software aging.
