1. Slide 1 Use Case Points

2. Slide 2 Use Case Points* Use Case Points (UCP) is a current technique for measuring functionality of a software system. It can be used for each use case or all use cases. *Apparently also called “use case function points”, based on analogy to function point metric.

3. Slide 3 Use-Case Points l A size and effort estimation technique that was developed around use cases Better for OOSAD projects than function points l Requires at a minimum: The set of essential use cases The use case diagram All actors and use cases classified as simple, average, or complex

4. Slide 4 Steps of UCP (Use Case Points) Estimation 1.Classify actors, to determine UAW (Unadjusted Actor weight) 2.Classify use case, to determine UUCW (Unadjusted Use case Weight) 3.Compute UUCP (Unadjusted Use Case Points) 4.Compute technical and environmental factors 5.Computer the Adjusted Use Case Points 6.Translate into an estimate of human effort For each use case:

5. Slide 5 Steps in UCFP Estimation 1. Determine the UAW (Unadjusted Actor weight) a.Using the Actor Classification Table determine the classification of each of the actors in the system. b.Add the values of all the actors to determine the unadjusted actor weight of the system.

6. Slide 6 ClassificationTest to recognize classificationValue/Factor Simple Communicate to system through API. 1 Average Interact with the system through some protocol (HTTP, FTP, or probably some user defined protocol), or Are data stores (Files, RDBMS). 2 Complex Interacts through HCI (GUI) 3 Actor Classification Table

7. Slide 7 2.Determine number of UUCW (Unadjusted Use case Weight) 1.Using the Use Case Classification Table, determine the classification of each use case on the use case diagram. 2.Add the values of each use case to yield the unadjusted use case weight. Steps in UCFP Estimation

8. Slide 8 Use Case Classification Table Use Case TypeTest to recognize classificationValue/Factor Simple 1-3 transactions 5 Average 4-7 transactions 10 Complex More than 7 transactions 15

9. Slide 9 3.Determine Total UUCP (Unadjusted Use Case Points) using the formula below. Total UUCP = Total UAW + Total UUCW. Steps in UCFP Estimation

10. Slide 10 Technical Complexity Factors Technical Complexity Factor (TCF) = 0.6 + (0.01 * TFactor)

11. Slide 11 Environmental Factors Environmental Factor (EF) = 1.4 + (-0.03 * EFactor)

12. Slide 12 Person-Hours Multiplier If the sum of (number of Efactors E1 through E6 assigned value 3) ≤ 2 PHM = 20 Else If the sum of (number of Efactors E1 through E6 assigned value 3) = 3 or 4 PHM = 28 Else Rethink project; it has too high of a risk for failure

13. Slide 13 Computing Use-Case Points l Adjusted Use Case Points (UCP) = l UUCP * TCF * ECF l Effort in Person Hours = l UCP * PHM