flowcharts 3.3.1. this presentation covers what is a flowchart? why are they used? how to draw them
TRANSCRIPT
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FLOWCHARTS
3.3.1
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THIS PRESENTATION COVERS
• WHAT IS A FLOWCHART?
• WHY ARE THEY USED?
• HOW TO DRAW THEM.
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INTRODUCTION• DIAGRAMS ARE GREAT FOR HELPING PEOPLE UNDERSTAND HOW A
SYSTEM WORKS.
• HOWEVER, FOR THOSE WHO HAVE NO IDEA HOW TO CREATE A SYSTEM (GENERALLY THE CUSTOMER!) A MORE SIMPLIFIED METHOD OF HELPING THEM UNDERSTAND WHAT THE SYSTEM DOES NEEDS TO BE USED.
• FLOWCHARTS ARE SIMPLIFIED DIAGRAMS WHICH SHOW BASIC INPUT, OUTPUT, DECISIONS AND PROCESSES.
• BECAUSE THEY ARE SIMPLIFIED DIAGRAMS THEY CAN ONLY BE USED TO SHOW A GENERALISED OVERVIEW OF THE SYSTEM OR THE FUNCTIONS WITHIN IT.
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UNDERSTANDING THE SYMBOLSYOU CAN USE ANY SYMBOLS THAT YOU LIKE...AS LONG AS YOU HAVE A KEY AND STICK TO IT...BUT THESE ARE THE MORE COMMON SYMBOLS USED.
YOU CAN SEE THEM IN THE SHAPES OPTION IN MS APPLICATIONS...
OutputProcess
InputStart/End
Decision
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BOILING THE KETTLE EXAMPLEStart
Add water to kettle
Is it full?
Turn on power
Heat water
Is water boiling
?
Turn off power
End
Yes
No
Yes
No
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YOUR GO...
• PRODUCE A DATA FLOW DIAGRAM WHICH:
• CONTROLS A SET OF TRAFFIC LIGHTS OVER A BRIDGE WHICH ONLY ALLOWS TRAFFIC TO GO OVER IT IN ONE DIRECTION AT A TIME.
• LIFTS A BARRIER IF IT SENSES A CAR IS STATIONARY ON ITS WEIGHT PAD AND ALSO IF THE DRIVER HAS TAKEN A TICKET.
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YOUR GO AGAIN...
• GO TO THE ONLINE TEXT BOOK OR TO PAGE 33 OF THE TEXT BOOK...
• YOU WILL FIND AN EXAMPLE SCENARIO AND AN ACTIVITY...
• COMPLETE THE ACTIVITY.
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