Spot what is missing
A drawing shows a till sending sales straight into a report. No step checks the sales. No place keeps them.
A good analyst can read a diagram, say what it means and say what is wrong with it. They can also draw a new one.
Key words
| Word | What it means |
|---|---|
| Data flow diagram | a picture of how data moves through a system, called a DFD |
| Data source | a person or system outside the system that sends data in |
| Data destination | a person or system outside the system that receives data out |
| Process | a step that does something to the data |
| Data store | a place where data is kept |
| Interpret | read a diagram and say what it means |
| Label | words on an arrow that name the data |
The cells students fill in are left blank in this preview.
By the end of this lesson
Note
I can read a DFD and say what it shows, spot mistakes in one, and draw or complete one for a system.
Starter
Have a go
Starter
3 questionsHave a go: your answers are marked here and then forgotten. Sign in if you would like your score kept, and to pick up where you left off.Sign in to keep your score
Your answers are marked here and are not kept. A college account keeps every student’s marks.
Interpret the diagram
Have a go
Interpret the diagram
4 questionsHave a go: your answers are marked here and then forgotten. Sign in if you would like your score kept, and to pick up where you left off.Sign in to keep your score
Your answers are marked here and are not kept. A college account keeps every student’s marks.