INF2004F Summary Notes.docx

Ais focus on activities that add most value resolve

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AIS – focus on activities that add most value & resolve challenges arisen due to weak links in the value chain Manual Accounting Systems: One type of AIS Advantages: Learning curve – experience & grips with accounting transactions Cost – no accounting software Free from machines – free from computers & software crashes Disadvantages: Routine work Lack of security Time-consuming Inconsistency in data entry, room for errors, miskeying information Reduction in sharing information and customer services System: Set of things working together as part of a mechanism Made up of sub-systems If sub-systems have different goals – goal conflict Sub-systems have same aligning goals – goal congruence Module 2: e-Business and e-Commerce
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E-Business, E-Commerce, Web Commerce Electronic Business (E-Business) – usage of IT in any aspect of business (e.g. buying and selling, inventory, risk etc.) Electronic Commerce (E-Commerce) – usage of IT in the exchange of goods and services between organisations and/or individuals (e.g. banking) Web Commerce – usage of IT in the exchange of goods and services between organisations and/or individuals over the Internet (e.g. Gumtree) The Internet: Global system of interconnected networks IP address – identity number of each computer on the Internet Intranet – in-house network Extranet – private networks of two more intranets connected Security issues – might expose important information on the Internet Firewalls – limit access to information on private computers and servers Enterprise Architecture (EA) Frameworks EA framework – provides with principles and practices on how to use and create EA Zachman Framework – two-dimensional matrix: Rows: stakeholders Columns: aspects of architecture (e.g. data, locations, people etc.) The Open Group Architecture Framework (TOGAF) – provides Architecture Development Method (ADM) – how EA will meet business goals Federal Enterprise Architecture (FEA) Framework – set of interrelated ‘reference models’ – facilitate cross-agency analysis and identifies opportunities within agencies Domains of EA (Business, Data, Application & Technical) Enterprise architecture (EA) – describe joint structure and behaviour of an enterprise and its information system (IS) Business Architecture – defines human resources, processes and infrastructure that a business needs in order to achieve its strategy Data Architecture – defines required data, how to store, process, and use data & how it integrates with other sub-architectures Applications Architecture – applications to ensure that organisation creates systems that are SARM (scalable, available, reliable, manageable) Technical Architecture – defines standards, principles, procedures and best practices to govern IT architecture & structure and behaviour of IT infrastructure Electronic Payment systems
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