Information system

Information system Architecture, Information Engineering,Information system Planning

1. WELCOME....

2. Submitted by- Ayushi Dubey Class- M.sc ( C.S.) 3 th semester Session-2018 Submitted to- Prof. Mr. Yugal Sharma Government Holkar Science College, Indore (M.P.), INDIA

3. Contents- What is an Information System? Information System Architecture. Information Engineering. Information System Planning.

4. An information system is a collection of interrelated components that collect , process and store, and provide as output the information needed to complete a business task. Course registration system Online order system Online banking system Examples of Information Systems- What is an Information System?

5. An ISA is a “conceptual blueprint or plan that expresses the desired future structure for information systems in an organization” It provides a “context within which managers throughout the organization can make consistent decisions concerning their information systems”

6. Benefits of ISA:- “Provides a basis for strategic planning of IS. Provides a basis for communicating with top management and a context for budget decisions concerning IS. Provides a unifying concept for the various stakeholders in information systems. Communicates the overall direction for information technology and a context for decisions in this area. Helps achieve information integration when systems are distributed (increasing important in a global economy). Provides a basis for evaluating technology options (for example, downsizing and distributed processing)”.

7. Zachman ISA Framework components:- Data- The “ What ” of the information system. Process- The “ How ” of the information system. Network- The “ Where ” of the information system. People- Who performs processes and are the source and receiver of data and information. Events and Points in time- When processes are performed. Reasons- Why : For events and rules that govern processing.

8. Six roles or perspectives of the Data, Process and Network components- Business scope (Owner) Business model (Architect) Information systems model (Designer) Technology model (Builder) Technology definition (Contractor) Information system (User)

9. An Information Systems Architecture is developed by IS planners following a particular methodology such as Information Engineering . Or A formal methodology that is used to create and maintain information systems. Starts with the Business Model and works in a Top-Down fashion to build supporting data models and process models for that business model.

10. Top-Down Planning:- A methodology that attempts to gain a broad understanding of the information system needs of the entire organization

11. Information engineering- Information systems planning- Identify strategic planning factors (goals, CSFs, problem areas)- - IT vision Identify corporate planning objectives - Information system architecture Develop enterprise model. Systems analysis Systems design Implementation

12. Planning Design Analysis Implementation Planning- Enterprise modeling Analysis- Conceptual data modeling & part of logical DB design Design- Parts of both logical & physical DB design Implementation- DB implementation

13. Scope of IS is now the entire organization. Sometimes called “enterprise-wide” computing or “Information Architecture”. Problem: isolated groups in an organization start their own databases and it becomes impossible to find out who has what information, where there are overlaps, and to assess the accuracy of the information.

14. To support enterprise-wide computing, there must be enterprise-wide information planning. One framework for thinking about and planning for enterprise-wide computing is an Information Systems Architecture or ISA. Most organizations do NOT have such an architecture.

15. Short-, medium-, and long-range plans- Short-range – the next year, the next budget period; developing and operating current systems Medium-range – committing to development efforts for applications that will take more than one year to complete; meeting management’s current information needs, projected into the future for as many years as needed to complete them. This is what most organizations call “Long-Range Planning.” Long-range planning – preparing for management’s future information needs. These are not application specific; they are investments in infrastructure ; it is creating an information architecture .

16. THANK YOU