Unadjusted Use Case Weight (UUCW)
Use Case Classification
No. of Transactions
Weight
Simple
1 to 3 transactions
5
Average
4 to 7 transactions
10
Complex
8 or more transactions
15
Unadjusted Actor Weight (UAW)
Actor Classification
Type of Actor
Weight
Simple
External system that must interact with the system using a well-defined API
1
Average
External system that must interact with the system using standard communication protocols
2
Complex
Human actor using a GUI application interface
3
Technical Complexity Factor (TCF)
Factor
Description
Weight
T1
Distributed system
2.0
T2
Response time/performance objectives
1.0
T3
End-user efficiency
1.0
T4
Internal processing complexity
1.0
T5
Code reusability
1.0
T6
Easy to install
0.5
T7
Easy to use
0.5
T8
Portability to other platforms
2.0
T9
System maintenance
1.0
T10
Concurrent/parallel processing
1.0
T11
Security features
1.0
T12
Access for third parties
1.0
T13
End user training
1.0
Environmental Complexity Factor (ECF)
Factor
Description
Weight
E1
Familiarity with development process used
1.5
E2
Application experience
0.5
E3
Object-oriented experience of team
1.0
E4
Lead analyst capability
0.5
E5
Motivation of the team
1.0
E6
Stability of requirements
2.0
E7
Part-time staff
-1.0
E8
Difficult programming language
-1.0
Corresponding interpolation values (S) of Environmental Complexity Factor (ECF)
Result
Interpolation value (S)
> 0
0.05
> 1
0.1
> 2
0.6
> 3
1.0
Experience Stability Estimate (ES)
$$ES = \sum_{i=1}^8 S_i$$
Result
Estimate duration (P - hours per use case point)
< 1
48
>= 1
32
>= 3
20
Unadjusted Use Case Weight (UUCW) UUCW = (Total No. of Simple Use Cases x 5) + (Total No. Average Use Cases x 10) + (Total No. Complex Use Cases x 15)
Unadjusted Actor Weight (UAW) UAW = (Total No. of Simple Actors x 1) + (Total No. Average Actors x 2) + (Total No. Complex Actors x 3)
Use Case Points (UCP - AUCP) UCP(AUCP) = (UUCW + UAW) x TCF x ECF (UCP)
Step by step Use Case Points Methods
Technical Complexity Factor
Environmental Complexity Factor
