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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
Purchasing
Sales
Manufacturing
Administa
External Sources
survey results
financial information from a third party
supplier price lists
Data types
Primary data vs secondary data
Quantitative vs Qualitative data
5.2 Data Flow Diagram
Rules and tips
Each process should have at least one input and one output
Each data store should have at least one data flow in and data flow out
Data store in a system must go through a process
All processes in a DFD must go to another process or data store
Each external entity must have at least one input or output
Data flows in one direction
Each data flow connects to or at least one process
Symbols
