LO5 Flashcards
Internal Source
Information that comes from within an organisation, such as financial reports, data analysis or employee surveys.
External Source
Information that comes from outside of an organisation, such as government reports, financial data of competitors or price lists from suppliers.
Primary Data
Data that has been created and collected by yourself or another employee within an organisation. For example, interviews or questionnaires sent within the company.
Secondary Data
Data that has been created and collected by someone outside of the organisation, such as national census data collected by the government or surveys taken by a competitor. Some secondary data may need to be purchased.
Qualitative Data
This is descriptive data, often composed of text, that can be observed but not measured. For example, survey responses where customers are asked why they visit a particular shop.
Quantitative Data
This is measured data, often in the form of numbers, percentages or statistics. For example, survey responses of the amount of time it takes to reach a shop.
Data flow diagram Rules
Every data flow is labelled (with the data itself, not the action).
Every data flow connects to at least one process.
At least one input or output for each external entity.
Data flows only in one direction.
Level 0 Level 1 DFD
Level 1 data flow diagrams show the transfer of data in a more detailed manner. Processes are shown separately, for a more complex and realistic overview.
Level 0 data flow diagrams show the transfer of data in a simple manner. Processes may be generalised and not shown separately, for a more basic overview.
Impacts Affecting the Flow of Information
There are several reasons why the flow of information within an organisation may be delayed or inefficient, such as:
Information characteristics
e.g. information is entered incorrectly, causing delays.
Human error
e.g. information is lost or staff don’t follow protocol.
Hardware failure
e.g. network connection breaking or system failure.
Communication breakdown
e.g. meetings postponed or emails unread.
Data Store
Proccess
Data flow
External Entity