Summary: Strategic Enterprise Architecture Management Challenges, Best Practices, And Future... | 9783642242236 | Frederik Ahlemann, et al
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Read the summary and the most important questions on Strategic Enterprise Architecture Management Challenges, Best Practices, and Future Developments | 9783642242236 | Frederik Ahlemann; Eric Stettiner; Marcus Messerschmidt; Christine Legner
1.1 The Need for enterprise architecture management (EAM)
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What is the background for EAM?
Background is an turbulent and complex business environment. Which leads to:
- changes in organisation and processes, and to
- changes in structure, and to
- changes in enterprise architecture
What is the downside of architectural complexity?
- Loss of transparancy and overview
- Increased complexity costs (high investments, no bundling purchasing volumes, no synergies across subsidiaries)
- Increased risks (interfaces)
- Inability to consistently implement strategic directions across the organisation (difficulty restructure or redesign)
- Distraction from core business problems
What is a comparison for EAM?
EAM is similar to city planning. EAM seeks to maintain the flexiblity, cost-efficiency and transparancy in the enterprise architecture. It emphasises the interplay between business and technology.
Good city planning consists of:
- anticipate future demands and requirements
- make plans and develop accordingly
- bring stakeholders together and discuss
- serve the city as a whole, not local interests
- have a holistic, multi-perspective view on the city (socially, economically, logistically)
Questions that firms cannot answer anymore due to overly complex enterprise architecture:
- How can we successfully integrate new firms after an acquisitions?
- Can we introduce new products and services, using the existing business processes and the underlying applications?
- Which business units and users will be affected by an application's migration?
- What applications and infrastructure technologies do we require to run new or redesigned business processes?
What are the beneficial effects of EAM?
The effects result from:
- increased transparancy (documenting main EA components en their interrelationships)
- documented architecture vision (shared view by multiple stakeholders) and
- architecture principles and guidelines (modularisation)
1.2 What is enterprise architecture management?
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What is the history of EAM?
- Phase 1 ('80 - '90): Take the big picture - EAM for IS engineering. EAM is rooted in Zachman's framework for the holistic engineering of information systems (Zachman's idea of a multi-perspective and multi-layered enterprise modelling approach became state-of-the-art)
- Phase 2 ('90 - '00): Adapt your management processes' - EAM for IS management. Advanced EAM frameworks integrate planning, implementation and controlling processes for IT/IS landscapes.
- Phase 3 ('00 - '10): Make it strategic - EAM for strategic business management. EAM becomes a strategic function attached to a board member.
What is the strategic importance of developing an enterprise architecture?
The reasons are:
- IS/IT as a means of strategic and organisational transformation
- Increased outsourcing (concentrate on core competencies)
- IT/IS as a commodity (cloud, SaaS)
- Business-IT alignment
What is enterprise architecture?EA is the fundamental organisation of an enterprise as a socio-technical system, along with the principles governing its design and development. An EA includes all relevant components for describing an enterprise: business and operating model, organisational structure, business processes, data, applications and technology.
Which layers exist in an EA model?
- strategic layer - business strategy (the firm's business or operating model) TOM: target operating model
- organisation and process layer: firm's organisational structure and its process organisation
- information systems layer (application layer, data layer, integration layer): describes how information is processed and shared electronically within and across organisations
- technology or infrastructure layer
- people and competencies layer
These layers build up hierarchically and relate to each other.
What is EAM in summary?
- a holistic way to understand, plan, develop and control an organisation's architecture (EAM as a management philosophy)
- a support function to enable and improve existing strategy planning and strategy implementation processes (EAM as an organisational function)
- a set of management practices that helps to improve the quality of decision-making (EAM as a methodology), and
- an open approach to reach consensus among managers on the basis of their shared vision of establishing a global optimum for the firm, free of local and personal egoism and opportunism (EAM as a culture)
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