Use Case Analysis

A Use Case Point Analysis is a tool to estimate the effort required to complete a software project, based on the number ofuse cases and the other features of object-orientation.

Unadjusted Actor Weighting Table

Actor Type	Description	Weighting Factor	Number	Result
Simple	External System with well-defined API	1
Average	External System using a protocol-based interface, e.g., HTTP, TCP/IP, or a database	2
Complex	Human	3
Unadjusted Actor Weight Total (UAW) =

Technical Complexity Factors

Use Case Type	Description	Weighting Factor	Number	Result
Simple	1-3 transactions	5
Average	4-7 transactions	10
Complex	>7 transactions	15
Unadjusted Actor Weight Total (UUCW) =

Unadjusted Use Case Points (UUCP) = + =

Technical Complexity Factors

Factor Number	Description	Weight	Assigned Value (0 - 5)	Weighted Value	Notes
T1	Distributed system	2
T2	Response time or throughput performance objectives	1
T3	End user online efficiency	1
T4	Complex internal processing	1
T5	Reusability of code	1
T6	Easy to install	0.5
T7	Ease of use	0.5
T8	Portability	2
T9	Ease of Change	1
T10	Concurrency	1
T11	Special security objectives included	1
T12	Direct access for third parties	1
T13	Special User training required	1
Technical Factor Value (TFactor) =

Technical Complexity Factor (TCF) =

Environmental Factors

Factor Number	Description	Weight	Assigned Value (0 - 5)	Weighted Value	Notes
E1	Familiarity with system development process being used	1.5
E2	Application experience	0.5
E3	Object-oriented experience	1
E4	Lead analyst capability	0.5
E5	Motivation	1
E6	Requirements stability	2
E7	Part time staff	-1
E8	Difficulty of programming language	-1
Environmental Factor Value (EFactor) =

Environmental Factor (EF) =

Adjusted Use Case Points (UCP) =

Person Hours Multiplier (PHM) =

Effort in Person Hours =

This document is based on a template located at: http://www3.interscience.wiley.com:8100/legacy/college/dennis/0471348066/uml_templates/figure06_11.doc