LO5 - Understand the process flow of information Flashcards
what are the different types of data
primary and secondary
what are the different categories of information
confidentiality, integrity, availability (CIA)
what are the different types of data
primary and secondary
what are the different sources of information
internal and external
what is quantitative data
this is data that is usually measured in numbers or statistics, for example survey results of how many times a person visits a shop
what is qualitative data
this is descriptive data, often composed of text that can be observed but not measured, for example survey responses where people are asked why they go to a specific shop
What are data flow diagrams?
A visual representation of how data moves within an information system
A visual representation of how data moves within an information system
What is a data flow?
The path that data takes through the system that is represented by an arrowed line. The arrowed line should have a description of the data.
What is a process?
A process is anything that causes the data to be changed in some plan way. A process is represented as a box.
What is an external entity?
An external entity sends or receives data from the system. It can represent a person, a machine, an organization etc., that is external to the system being modeled. Flows outgoing from external entities go to processes.
Identify three external entities for a train booking
Manage payment details, ticket management, customers management
