it was just a lacture

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2. Information system
Group members
Shoaib shaikh & Syed Ahsan
Shaheed Benazir Bhutto University SBA
Topic of presentation
is:

3. What is Information system
• An information system is defined as the
software that helps organize and analyze data.
So, the purpose of an information system is to
turn raw data into useful information that can
be used for decision making in an
organization.
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4. Infrastructure
• Infrastructure consists of physical facilities,
services and management that supports all
computing resources in an organization.
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5. Infrastructure
• There are five major components of
infrastructure:
• Computer hardware
• General purpose software
• Networks & communication facilities
• Databases
• Information management personnel
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6. Infrastructure
• Each of these components is designed in such
manner to collectively meet the needs and
objectives of the organization.
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7. Infrastructure
• Infrastructure also includes the integration,
operation, documentation, maintenance and
management of the these components.
• To information system users, infrastructure is
everything that supports the flow and processing
of information.
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8. Architecture
• Architecture is the “Blueprint” that provides the
conceptual foundation for building information
infrastructure and specific applications.
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9. Architecture
• Architecture covers;
• business needs for information which is the
requirement of the organization;
• existing and planned information infrastructure;
and
• applications with in the organization.
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10. Components/Sub-Systems of CBIS
• These are:
• Transaction Processing System
• Management Information System
• Support Systems
• Office Automation System
• Decision Support System
• Knowledge System
• Executive Support System
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11. Transaction Processing System
Transaction Processing System is used to record
transactions of routine and repetitive nature.
For Instance
• Defining the transaction recording structure
• Placing customer orders
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12. Data Processing Tasks
• Data identification and Gathering – keying in
the data or obtaining it directly from machines
by providing suitable interface
• Data manipulation/Analysis – refers to
transformation of data into information
• Classifying
• Sorting
• Calculating
• Summarizing
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13. Data Processing Tasks
• Data storage – data is kept somewhere in a
sequenced manner until when needed.
• Document Preparation – output for managers as
reports or as input to other systems.
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14. Management Information System
Major purpose is report generation. Major report types
include:
•Periodic reports – daily, weekly, monthly, annually, format is
predefined and structured for convenience.
•Special Reports – Management by Exception reports
only when a special event occurs which needs to be
monitored. For instance
• Report sequence to highlight – fast moving & slow moving
• Group the exceptions together – Aged accounts receivable
• Show variance from the norm – Sales analysis report
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