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Tables of Contents for Writing Effective Use Cases
Chapter/Section Title
Page #
Page Count
Preface
xix
Acknowledgments
xxiii
Introduction
1
20
What Is a Use Case (More or Less)?
1
6
Buy Stocks over the Web
4
1
Get Paid for Car Accident
5
1
Register Arrival of a Box
6
1
Your Use Case Is Not My Use Case
7
6
Buy Something (Casual Version)
9
1
Buy Something (Fully Dressed Version)
9
3
``Discovering'' Requirements in New Territory
12
1
Steve Adolph
Requirements and Use Cases
13
2
Use Cases as Project-Linking Structure
14
1
The ``Hub-and-Spoke'' model of requirements
15
1
When Use Cases Add Value
15
1
Manage Your Energy
16
1
Warm Up with a Usage Narrative
17
2
Usage Narative: Getting ``Fast Cash''
18
1
Exercises
19
2
Part 1 The Use Case Body Parts
21
117
The Use Case as a Contract for Behavior
23
12
Interactions between Actors with Goals
23
6
Actors Have Goals
23
1
An actor with a goal calls on the responsibilities of another
24
1
Goals Can Fail
25
1
Interactions Are Compound
25
2
A Use Case Collects Scenarios
27
1
Striped trousers: Scenarios succeed or fail
28
1
The striped trousers showing subgoals
29
1
Contract between Stakeholders with Interests
29
2
The SuD serves the primary actor, protecting offstage stakeholders
30
1
The Graphical Model
31
4
Actors and stakeholders
32
1
Behavior
32
1
Use Case as responsibility invocation
33
1
Interactions as composite
33
2
Scope
35
18
A Sample In/Out List
36
1
Functional Scope
36
2
The Actor-Goal List
36
1
A Sample Actor-Goal List
37
1
The Use Case Briefs
37
1
Sample Use Case Briefs
38
1
Design Scope
38
11
Design scope can be any size
40
1
Using Graphical Icons to Highlight the Design Scope
40
1
Design Scope Examples
41
1
Enterprise-to-System Examples
41
1
Add New Service (Enterprise)
42
1
Add New Service (Acura)
42
1
Many Computers to One Application
43
1
Enter and Update Requests (Joint System)
43
1
Add New Service (into Acura)
44
1
Note New Service Request (in BSSO)
44
1
Update Service Request (in BSSO)
44
1
Note Update Request (in Acura)
44
1
Use case diagrams for Acura-BSSO
45
1
A combined use case diagram for Acura-BSSO
45
1
Nuts and Bolts Use Cases
46
1
Serialize Access to a Resource
46
1
Apply a Lock Conversion Policy
47
1
Apply an Access Compatibility Policy
48
1
Apply an Access Selection Policy
48
1
Make Service Client Wait for Resource Access
49
1
The Outermost Use Cases
49
2
Using the Scope-Defining Work Products
51
1
Exercises
51
2
Stakeholders and Actors
53
8
Stakeholders
53
1
The Primary Actor
54
5
Why Primary Actors Are Unimportant (and Important)
55
2
Actors versus Roles
57
1
Characterizing the Primary Actors
58
A Sample Actor Profile Table
56
3
Supporting Actors
59
1
The System Under Discussion
59
1
Internal Actors and White-Box Use Cases
59
1
Exercises
60
1
Three Named Goal Levels
61
20
Use Case levels
62
1
User Goals (Blue, Sea-Level)
62
2
Two Levels of Blue
63
1
Summary Level (White, Cloud/Kite)
64
2
Operate an Insurance Policy+
65
1
The Outermost Use Case Revisited
65
1
Subfunctions (Indigo/Black, Underwater/Clam)
66
1
Summarizing Goal Levels
66
1
Using Graphical Icons to Highlight Goal Levels
67
1
Finding the Right Goal Level
68
2
Finding the User's Goal
68
1
Raising and Lowering Goal Levels
69
1
Ask ``why'' to shift levels
69
1
A Longer Writing Sample: ``Handle a Claim'' at Several Levels
70
9
Handle a Claim (Business)
71
1
Evaluate Work Comp Claim
72
1
Handle a Claim (Systems) +
73
2
Register a Loss
75
4
Find a Whatever (Problem Statement)
79
1
Exercises
79
2
Preconditions, Triggers, and Guarantees
81
6
Preconditions
81
2
Minimal Guarantees
83
1
Success Guarantee
84
1
Triggers
84
1
Exercises
85
2
Scenarios and Steps
87
12
The Main Success Scenario
87
3
The Common Surrounding Structure
87
2
The Scenario Body
89
1
Action Steps
90
8
Guidelines
90
1
Use Simple Grammar
90
1
Show Clearly ``Who Has the Ball''
90
1
Write from a Bird's Eye View
91
1
Show the Process Moving Forward
91
1
Show the Actor's Intent, Not the Movements
92
1
Include a ``Reasonable'' Set of Actions
93
1
A transaction has four parts
93
2
``Validate,'' Don't ``Check Whether''
95
1
Optionally Mention the Timing
95
1
Idiom: ``User Has System A Kick System B''
96
1
Idiom: ``Do Steps x-y until Condition''
96
1
To Number or Not to Number
97
1
Exercises
98
1
Extensions
99
12
Extension Basics
99
1
The Extension Conditions
100
6
Brainstorm All Conceivable Failures and Alternative Courses
101
1
Make the Condition Say What Was Detected
102
2
Rationalize the Extensions List
104
1
Rollup Failures
105
1
Extension Handling
106
4
Indent Condition Handling
108
1
Failures within Failures
109
1
Creating a New Use Case from an Extension
109
1
Exercises
110
1
Technology and Data Variations
111
2
Technology variations using specialization in UML
112
1
Linking Use Cases
113
6
Sub Use Cases
113
1
Extension Use Cases
114
3
UML diagram of extension use cases
115
1
When to Use Extension Use Cases
116
1
Exercises
117
2
Use Case Formats
119
19
Formats to Choose From
119
9
Fully Dressed
119
1
Fully Dressed Use Case Template
119
1
Casual
120
1
Actually Login (Casual Version)
120
1
One-Column Table
121
1
One-Column Table Format of a Use Case
121
1
Two-Column Table
122
1
Two-Column Table
122
1
RUP Style
123
1
Register for Courses
124
2
If-Statement Style
126
1
Occam Style
126
1
Diagram Style
127
1
The UML Use Case Diagram
128
1
Forces Affecting Use Case Writing Styles
128
4
Consistency
130
1
Complexity
130
2
Standards for Five Project Types
132
5
For Requirements Elicitation
133
1
Elicitation Template---Oble a New Biscum
133
1
For Business Process Modeling
134
1
Business Process Template---Symp a Carstromming
134
1
For Sizing the Requirements
135
1
Sizing Template---Burble the Tramling
135
1
For a Short, High-Pressure Project
136
1
High-Pressure Template: Kree a Ranfath
136
1
For Detailed Functional Requirements
137
1
Use Case Name---Nathorize a Permion
137
1
Conclusion
137
1
Exercise
138