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LO5- Understand the process flow of information (5.1 Information sources…
LO5- Understand the process flow of information
5.1 Information sources and data
Information Sources
Internal sources
Financial
Personnel
Marketing
Sales
Marketing
Administration
Purchasing
Manufacturing
External sources
Financial information from a third party
Supplier price list
Survey results
Data types
Primary data vs secondary data
Qualitative vs quantitive
Data flow diagrams
Rules and tips :
Data stored in a system must go through the process
Each external entity must have at least one input or an output
Each data store should have at least one data flow in and data flow out
All processes in a DFD must go to another process
Each process should have at least one input and one output