CS1004-Information system and organisations

Question 1

what is a system?

Answer 1

non-random collection of different parts that interact with each other. has input and output from their enviroments

Question 2

what is data? what is information?

Answer 2

data is a record or fact.
undergo processing to become information

information is data processed for a purpose
used to make a decision

• reduces uncertainty.
• quantifiable and unquantifiable value
• product a is doing well, lets increase its stock

information system is a system that provides information that helps make decision with business activities

Question 3

open and closed systems?

Answer 3

open interact with the environments
input and outputs can be of all sorts
material labours

closed does not interact with the enviroment

Question 3

open and closed systems?

Answer 3

open interact with the environments
input and outputs can be of all sorts
material labours

closed does not interact with the enviroment

Question 4

idc

Answer 4

intelligence - a problem exist
design- develop alternative courses of action
choice- select a course of action

Question 5

structured and unstructured decisions

Answer 5

structured - governed by clear rules and
steps to make a decisions.
the more structured a system the more likely to make a better decision
reordering stock

unstructured - no set of rules to make a decision
complex customers queries

Question 6

Transaction processing system(TPS)

Answer 6

processes day-to-day data

• lower level
• directly supports business activities
• has a defined outcome
• cannot deal with incomplete data or uncertainty
• rule based
  e. g income tax

Question 7

Management information system(MIS)

Answer 7

uses data from TPS and produces a summary and statistics

• routine reports
• monthly summary of sales from a product type

Question 8

Decision support systems (DSS)

Answer 8

an interactive system that helps manager with unstructured decisions

• higher level
• can answer what if questions
• may take data from tps or mis
• provides special analysis and reports
• may use models

Question 9

Expert system

Answer 9

a system that can mimic the decision making abilities of human experts

• can answer complex if then and what if
• can use incomplete and uncertain data
• specialise in a particular subject area
• uses ai
• takes user input and produces a output