Question

You have been asked to carry out use case modelling to identify the functional requirements for a new fitness app (provisionally named FitFoodFastFacts) which is targeted at users who want to track their food intake and balance it with their exercise profile and goals, similar to the functionality provided by MyFitnessPal, Fooducate, MyPlate, and others.

The target user of FitFoodFastFacts is anyone who is interested in monitoring their food intake in order to gain a better understanding of their nutrition, or to gain or lose weight.

Users will be able to customise the app for their own profile and needs: for example, gender, age, height, weight, target weight, target kilojoules and target macros (percentage of carbohydrates, protein and fat consumed per day). They will also be able to record their activities each day (run, swim, etc). They will be able to select a food from the app’s database and record the quantity they consumed of it at each meal. They will also have the ability to add new nutritional information either manually or by scanning the barcode of the product. The app will provide a range of useful summaries of the personal data input by the user over various time periods.

Use the user goal technique to identify all the use cases that would be relevant to a potential user of the FitFoodFastFacts app. Use the brief description above, your own experience or potential requirements of such an app, and any research you need to do.

(a) Present your list in a table giving the use case name and an informative brief description.

(b) Draw a use case diagram representing the same information

Answer 1

Solution for the problem is provided below, please comment if any doubts:

a)

The use cases:

• The use cases are main objectives or functions that needs to be performed by the system as a unit.
• These are activities that affected the action of the actors.
• Thus the use cases will be linked with the actors.

The use cases and their description identified from the given scenario are tabulated below:

Use case	Description
Update the profile	To customize the application to match with the users profile.
Set the health objectives	To set the health and diet objectives.
Record the physical activities	To record the activities like run, swimming, .to record the energy consulted by that activity.
Record the quantity of meal	To record the intake content in the application to record the intake energy.
Add a new food	To add information a new food.
Read barcode	This is an included use case of add a new food.
Show summary	To display the summary of various time periods

b) The use case diagram: