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As you found this post useful Often so many new product managers think being perfect will impress their audience, but having strongly written use cases with a few mistakes is FAR better than an over complicated detailed list that confuses and bores an audience. Developing use cases should be looked at as an iterative process where you work and refine.
Remember, humans are reading your use cases, not a bunch of robots, so keep it interesting. What is an actor? Generally, the users are actors but often systems can be actors as well.
There are possibly over a dozen actors that interact with Ebay, from buyers and sellers, down to suppliers, wholesalers, auditors, and customer service. So lets put them down as our first actors. While John may be a seller and Sue may be a buyer, an actor is a Role.
And a role in this case would be that of a buyer and that of a seller. Now that things are clicking, lets throw some more actors on your paper just so we can try and identify more possible users. Now we have a bunch of actors. Wait a minute? An actor can be a system, because a system plays another role in the context of your new system and has goals and interacts with other actors as you will see later. These are sometimes referred to as your primary use cases.
The product manager should be able to discern a common use case from the edge case and prioritize accordingly. So, once you are done with your sunny-day use cases, distribute it among your project team and get consensus that you have covered them all. It should be a business question as far as how much software development costs do you want to spend on something that is not likely to happen.
Identify reuse opportunity for use cases In this step, you are going to cross the bridge into object modeling.
An effective Use Case should provide a detailed step-by-step description of how the system will be used by its actors to achieve the planned outcome. The purpose of the Use Case is to tie the business needs of the system to the design parameters of the system to ensure that the completed system achieves the goals established by the business requirements. The level of detail in Use Cases may vary greatly depending on the size and complexity of the system being designed.
ABC Corp. SAP to help manage material ordering and inventory management. Use Case formats and contents may vary based on system requirements, organizational standards, or unique situations. However, a majority of Use Cases consist of some fundamental contents which may be applied across a wide range of system types.
This section will provide explanations for each section of the Use Case. Name of Use Case: Provide a short name for the use case which should lend itself to the objective of the system. Description: This section should provide a description of both the reason for using the use case and the expected outcome of the use case. Actors: Actors may be primary or secondary. Primary actors are the people who will be initiating the system described in the use case.
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