Service-Oriented Architecture: A New Platform for Very Large IT Projects

Service-Oriented Architecture: A New Platform for Very Large IT Projects

Matthew Guah (Erasmus School of Economics, The Netherlands)
Copyright: © 2009 |Pages: 21
DOI: 10.4018/978-1-59904-546-7.ch009
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Abstract

For centuries, organizations have been trying to exchange information between their applications by linking them together. However, such application integration has not been as successful as organizations have hoped. With the introduction of SOA, application integration is more successful than the previous integration techniques. SOA is a design philosophy in which resources are cleanly partitioned into remotely accessible software components performing self-contained functionalities, called services. The reinvention of SOA in recent times is attributed to the rise of Web Services, which has become commonly used in VLITP to expose services within the host organization. However SOA can also be implemented with other service exposing techniques. SOA is based on the concept of separation of concerns, realizing that no single entity can be best at everything. SOA is usually implemented using an Enterprise Service Bus (ESB). The ESB is responsible for routing, prioritizing, scheduling, monitoring, and controlling the flow of traffic between services and therefore forms the middleware for Service Orientation.
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Concept Of Soa

SOA is a framework that offers application integration based on the concept of providing independent or loosely coupled services. It is viewed from a technological perspective as well as a business perspective not just as a result of previous integration solutions being too technological driven but also due to its focus on the business requirements. SOA can be expressed as a set of flexible services and processes that a business wants to expose to its customers, partners or internally to other parts of the organization (Bierberstein, 2005). SOA defines software in terms of discrete services, which are implemented using components that can be called upon to perform a specified operation for a specific business task (Bierberstein, 2005).

During the late 1990s many organizations invested heavily in Information Technology. Their ever-growing architectures had become increasingly difficult to integrate and new company-wide applications called Enterprise Resource Planning (ERP) systems emerged. These systems had been designed to integrate and optimize various business processes such as order entry and production planning across the entire organization (Mabert et al, 2001). For example a clerk in the delivery department registered that new goods have arrived. The ERP software automatically triggered an update of the stock ledger and adjusted the machines’ production schedules.

ERP packages were advertised as end-to-end solutions, which could replace all other existing application. However many organizations discovered that these packages could not provide all the required functionalities and had to implement ERP within the existing architecture (Mabert et al, 2001). ERP package had become one of many applications in organizations. Some organizations even use multiple ERP packages.

Complete Chapter List

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Table of Contents
Foreword
Leslie Willcocks
Acknowledgment
Chapter 1
Matthew Guah
This chapter classifies the purpose of project management in IT projects as a means of introducing the topics covered in the book and demonstrates... Sample PDF
Introduction to Very Large IT Projects
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Chapter 2
Matthew Guah
By examining the history of what was earlier considered project management, this chapter not only points out lessons from past practices but also... Sample PDF
The Field of Project Management
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Chapter 3
Matthew Guah
The basis upon which the objectives and policies for managing a VLITP are formulated is the need to achieve the project objectives on time and under... Sample PDF
Why Implement Very Large IT Projects
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Chapter 4
Matthew Guah
Different VLITP methodologies are capable of solving various types of problems during a project life cycle. This chapter shows that effect of VLITP... Sample PDF
Methodologies for Implementing VLITPs
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Chapter 5
IT Governance  (pages 69-83)
Matthew Guah
VLITP managers face unprecedented expectations for their governance. These expectations are driven by mandates and other demands from host... Sample PDF
IT Governance
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Chapter 6
IT Security  (pages 84-95)
Matthew Guah
One area that has scarcely received attention in the IT security literature, is the role that individual compliance plays in preventing... Sample PDF
IT Security
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Chapter 7
Matthew Guah
The study of diffusion, adoption, and IT project implementation in popular literature relies on theories which do not address the question of why... Sample PDF
Human Resource Issues in VLITP
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Chapter 8
Matthew Guah
Medical accidents, such as those that occur as a consequence of errors in medical systems, rarely happen because of a single failure. They are... Sample PDF
Ergonomics of Very Large IT Projects
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Chapter 9
Matthew Guah
For centuries, organizations have been trying to exchange information between their applications by linking them together. However, such application... Sample PDF
Service-Oriented Architecture: A New Platform for Very Large IT Projects
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Chapter 10
Matthew Guah
The chapter seeks to advance the practice perspective of VLITP by drawing attention to individual, collective sub-teams and host organizational... Sample PDF
Business Process Management
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Chapter 11
Matthew Guah
VLITP escalation has been documented to be a widespread phenomenon in the 21st century. Nearly every research in this area has portrayed escalation... Sample PDF
Outsourcing and Escalation Issues in VLITPs
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Chapter 12
Matthew Guah
The traditional way to achieve the automatic execution of project management processes is to develop or purchase an application that executes the... Sample PDF
VLITP Management Framework
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Chapter 13
Matthew Guah
The National Programme for Information Technology is the largest civil IT program worldwide at an estimated cost of £6.2 bn, US$ 10 billion, over a... Sample PDF
Case Study I: National Program for IT
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Chapter 14
Matthew Guah
VLITP can shift the direction of organizations by introducing new systems and emerging technologies that can serve as a trigger for change to the... Sample PDF
Case Study II: RFID—A Technology for Enterprise Systems in the Airlines Industry
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Chapter 15
Matthew Guah
Prediction markets have proven high forecasting performance in many areas such as politics, sports, and business-related fields, compared to... Sample PDF
Case Study III: VLITP in Public Transport— Implementing OV-Chipcard in The Netherlands
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