<Use Case Points>

Use Case Points

Use Case Points

Use Case points were first described by Gustav Karner, but his original work is closely guarded by Rational Software. These notes, therefore, primarily documents Karner's work as described by Schneider and Winters (1998), Ribu (2001) and Cohn (2005).

Lalcrest can help you size your software according to these conventions. Thus allowing you to make meaningful comparisons between different systems and /or development and enhancement projects.

The number of Use Case Points is a function of the following:

the number and complexity of the use cases in the system

the number and complexity of the actors in the system

various non-functional requirements

the environment in which the project will be developed.

Lalcrest can help you build models of your use case points and extract information therefrom.

Use Case Hierarchy

Colour Coding Key

Use Case Point Summary

Use Case Point Type	Complexity	Number of Use Cases and Actors	Use Case Points Awarded	Use Case Points
Use Case	Low	0	5	0
	Average	0	10	0
	High	5	15	75
	sub-total	5		75
Actor	Low	0	1	0
	Average	0	2	0
	High	1	3	3
	sub-total	1		3

Total Unadjusted Use Case Points				78
Technical Complexity Factor				1.05
Environmental Complexity Factor				0.99
Total Use Case Points				81

Use Case Points and Function Points are intended to measure similar aspects of software developments. It can be useful to use both measures.

Using Use Case Points with Function Points