Time for action – Implementing an order entry model

The context of the model is an order entry system. The model shall be used as a base for a solution that helps to enter orders into the system. Those orders are placed by customers via phone calls.

  1. Take a piece of paper and try to identify entities that play a role in this context. Draw a box for each entity identified. Try to come up with a solution without reading ahead!
  2. Define the relations between the entities by drawing connecting lines between them. Try to define the type of relation, whether it is a one-to-many, or a reference, and so on.
  3. For each entity, define and write in the corresponding box the most important properties.
  4. Try to identify sets of properties in your entities that are good ...

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