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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 types
Internal sources
Internal financial reports
Market analysis
Personal
Purchasing
Manufacturing
Administration
Sales
External sources
Supplier price list
Financial report from third party
Survey results
data types
Primary data
Internal
Secondary data
External
Qualitative
Detail
Paragraph
Quantitative
Numbers
5.2 Data flow diagrams (DFDs)
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 is stored in a system must have go through a process
All process in a DFD must go through another process or data store
Each data flow connects to at least one process
Each external entity must have at least one output or input
Symbols
Impacts affecting the flow of information in information system
Human error data being lost, data being processed incorrectly
Complete or particular system failure, delay in the system
