unit 2: information systems ocr level 3 cambridge technicals in it
TRANSCRIPT
Unit 2: Information Systems
OCR Level 3Cambridge Technicals
in IT
Data v InformationData v InformationMost businesses generate, and often record, huge volumes of data about a wide range of
activities:
Data v InformationData v InformationBut humans are not good at understanding and drawing
conclusions from large quantities of raw data.
In order for the data to become useful it must be analysed and formatted.
People can then use it to inform their decision making.
Data AnalysisData AnalysisOften data analysis will consist of comparing two variables against each other to see if there is a
relationship.
If there is a correlation between the variables the
next step may be to look for trends and to understand
how one variable influences
the other.
Data AnalysisData AnalysisVery often one of the variables used to analyse data is
time, as we look to see if variables are increasing or decreasing over time, and whether there are cyclical
patterns in the data.
Data ManagementData ManagementIt is important to ensure that the data used for any
analysis is ‘good’ data, so that any information derived from it is most likely to be correct.
‘Good’ data is accurate, relevant, complete, objective
and current.
Information SystemsInformation SystemsThere are various types of information systems,
including:
Most information systems are designed to help people handle large amounts of information, understand
complex variables, and control simultaneous processes.
Transaction processing
systems
Office systems
Knowledge management
systems
Database management
systems
What will you learn?What will you learn?After completing this unit you will:
Be able to explain the characteristics of ‘good’ data
Be able to select and use data to support business activities
Understand how organisations gather, analyse
and use data
Be able to present data in an appropriate format for
specific purposes
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