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a) Identify three roles of- information systems in-an. organisation. b) State and explain the components of an information system.

a) Identify three roles of- information systems in-an. organisation.
b) State and explain the components of an information system.

Answers

Kavungya
a) Role of information system in an organization
1. Transaction processing: Transaction processing systems process and record transactions
as well as update records. They automate the handling of data about business activities
and transactions.
2. Management reporting: This is the function involved in producing outputs for users.
These outputs are mainly as reports to management for planning, control and monitoring
purposes.
3. Decision support: This supports managers in day-to-day decision-making by use of
models, which can easily be understood and used by managers for decision making
purposes.

b) Components of an information system include:
i. People - These use the system to fulfill their informational needs. They include end users
and operations personnel such as computer operators, systems analysts, programmers
information systems management and data administrators.
ii. Computer Hardware - Refers to physical computer equipment and devices, which
provide for five major functions.
i. Input or data entry
ii. Output
iii. Secondary storage for data and programs
iv. Central processor (computation, control)
v. Communication
iii. Computer Software - Refers to the instructions that direct the operation of the computer
hardware. It is classified into system and application software.
iv. Telecommunication System/Communication network
v. Databases - Contains all data utilized by application software. An individual set of stored
data is referred to as a file. Physical storage media evidences the physical existence of
stored data, that is: tapes, disk packs, cartridges, and diskettes.
vi. Procedures - Formal operating procedures are components because they exist in physical
forms as manuals or instruction booklets. Three major types of procedures are required.
a) User instructions - for application users to record data, to use a terminal for data
entry or retrieval, or use the result.
b) Instructions for preparation of input by data preparation personnel.
c) Operating instructions for computer operations personnel.
Kavungya answered the question on May 14, 2019 at 07:56

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