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Process Flow Diagram (PFD)

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Process Flow Diagram (PFD)

A Process Flow Diagram (PFD) is a graphical representation of the major components and flow paths within a process.

Components

There are three components to a PFD:

  • A storage node represented by a triangle.
  • A process node represented by a rectangle.
  • A decision note represented by a diamond.

A Flow Unit is the item being processed through the system depicted in a PFD. Examples of flow units include:

  • Customers in a service system.
  • Products in a manufacturing system.
  • Data packets in a computer network.

Example

Graph View

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