Flowcharts

Flowcharts

• 1.
  Craig Corbett
• 2.
  What is asystem flow chart? Entering a room • A flowchart is a diagram which shows Start a task that has been Enter room broken down into each part and shows Is it dark No when a decision needs to be made. Yes Therefore showing Switch light on exactly how the data Sit down moves. End
• 3.
  What do theSymbols mean? • System flow charts use standard symbols to represent each part of the task. Start / End • The beginning and end of the process. Decision • E.g. Is the data valid? Process • E.g. a computer program (automatic process) or filling in a form (manual process)
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  What are therules for flow charts? • All flow charts must Start start with the Start symbol with only one arrow leaving it • All Flow charts must End finish with the End Symbol with only one arrow leading to it.
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  What are therules for flow charts? • Flow charts have processes. These are instructions or actions that need to be done. • The processes can be automatic or manual. • A rectangle signifies the processes with an arrow going in and one coming out.
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  What are therules for flow charts? • Flow charts also include ‘decisions’. • Most decisions are questions i.e. ‘ is it dark?’ No • A diamond shape signifies a decision. • There maybe a number Yes of arrows showing different options leaving them and in some cases it may allow a step to be missed out.
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  What are therules for flow charts? Entering a room Start / End Start Symbols Enter room Process / action Decision Is it dark Switch light on Sit down End
• 8.
  Test Your Knowledge Ordering Lunch • Can you identify Start where the Order a sandwich following are in the flow chart: Want Yes Order crisps • Start Crisps? No • End Want Yes • All processes drink? Order drink No • All decisions Sit down End