1What does Use Case mean and what does use case describe 2 W

1.What does Use Case mean? and what does use case describe?

2. What does triggers mean in use case, and what are the trigger types? and who\'s usually be a trigger?

3. Describe the best way to validate the content of use cases.

4. What is the purpose of an intersection entity? Describe the steps used to create an intersection entity?

Solution

1.

Use case:

The list of Use Case elements are as follows:

2.

Trigger:

Temporal trigger

Examples of temporal trigger:

For university library borrowing system, the temporal trigger is, Book lending term expires

External trigger

Examples of external trigger:

A patient purchases the new eye glass. Then, the external trigger is, Patient requires new glasses.

3.

Validate the content of use cases

Validating the use case:

The final step “confirm the use case” is used to validate the contents of the use case.

Therefore, this approach will be used to detect the errors or confirm the correctness of the use cases.

4.

Intersection entity

The entity is the basic block for building the data collected about the person, place, event or thing.

There are three special types of entities such as

Purpose of an Intersection Entity

If there is a need of more information between the two entities, then the intersection entity is used to capture the relationship.

Steps involved in intersection entity:

The following are the three basic steps involved in the intersection entity as given below:

Step 1:

Step 2:

Step 3: