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This book describes how to gather and define software requirements using a process based on use cases. It shows systems analysts and designers how use cases can provide solutions to the most challenging requirements issues, resulting in effective, quality systems that meet the needs of users.
Use Cases, Second Edition: Requirements in Context describes a three-step method for establishing requirements-an iterative process that produces increasingly refined requirements. Drawing on their extensive, real-world experience, the authors offer a wealth of advice on use-case driven lifecycles, planning for change, and keeping on track. In addition, they include numerous detailed examples to illustrate practical applications.
This second edition incorporates the many advancements in use case methodology that have occurred over the past few years. Specifically, this new edition features major changes to the methodology's iterations, and the section on management reflects the faster-paced, more "chaordic" software lifecycles prominent today. In addition, the authors have included a new chapter on use case traceability issues and have revised the appendixes to show more clearly how use cases evolve.
The book opens with a brief introduction to use cases and the Unified Modeling Language (UML). It explains how use cases reduce the incidence of duplicate and inconsistent requirements, and how they facilitate the documentation process and communication among stakeholders.
The book shows you how to:
Avoid classic mistakes and pitfalls
The book also highlights numerous currently available tools, including use case name filters, the context matrix, user interface requirements, and the authors' own "hierarchy killer."
Autorentext
Daryl Kulak is the president and CEO of Water-Logic Software (www.water-logic.com), an Internet business and technology consulting firm based in Columbus, Ohio. He is a graduate of the Northern Alberta Institute of Technology (NAIT) in Edmonton, Alberta. During much of his seventeen-year career managing software development projects in the United States and Canada, Daryl has focused on use cases, iterative/incremental development, and component design. Eamonn Guiney is a consultant at NewtonPartners (www.newtonpartners.com), a company that provides management consulting and system integration services to the money management industry. He is based in Sacramento, California. Eamonn creates business systems using a variety of tools, particularly object-oriented methodologies and use cases. 0321154983AB04012003
Inhalt
Preface. Preface to the First Edition. 1. The Trouble with Requirements.
First and Least of All.
What Is a Requirement?
Functional Requirements.
Nonfunctional Requirements.
Requirements Gathering, Definition, and Specification.
The Challenges of Requirements Gathering.
Finding Out What the Users Need.
Documenting Users' Needs.
Avoiding Premature Design Assumptions.
Resolving Conflicting Requirements.
Eliminating Redundant Requirements.
Reducing Overwhelming Volume.
Ensuring Requirements Traceability.
Issues with the Standard Approaches.
User Interviews.
Joint Requirements Planning Sessions.
Contract-Style Requirements Lists.
Prototypes.
Those Troublesome Requirements.
Moving to Use Cases.
It's All About Interactions.
The Unified Modeling Language.
Nine Diagrams.
Extending the UML with Stereotyping.
Introducing Use Cases, Use Case Diagrams, and Scenarios.
The Goals of Use Cases.
How Use Case Diagrams Show Relationships.
The Use Case Template.
Paths and Scenarios.
Use Cases Apply Here.
Use Cases for Inquiry-Only Systems.
Use Cases for Requests for Proposals.
Use Cases for Software Package Evaluation.
Use Cases for Non-Object-Oriented Systems.
Applying Use Cases to the Requirements Problem.
A Use-Case-Driven Approach to Requirements Gathering.
Requirements Specification Tools.
Principles for Requirements Success.
Three Steps for Gathering Requirements.
The Role of the Mission, Vision, Values.
The Role of the Statement of Work.
The Role of the Risk Analysis.
The Role of the Prototype.
The Roles of Use Cases.
Use Cases Are Effective Communication Vehicles.
Use Cases Can Be Used for Functional and Nonfunctional Requirements.
Use Cases Help Ensure Requirements Traceability.
Use Cases Discourage Premature Design.
The Role of the Business Rules Catalog.
Managing Success.
The Facade Iteration.
Objectives.
Users.
Project Team.
Industry Experts.
IT Management Group.
User Management Personnel.
Owners of the Data.
Steps in the Facade Iteration.
Create the Mission, Vision, Values.
Identify and Review Existing Documentation and Intellectual Capital.
Get the Executive Sponsor's Unique Viewpoint.
Review the Business Process Definitions.
Identify the Users, Customers, and Related Groups.
Interview the Stakeholders.
Create a Stakeholders List.
Find the Actors.
Create the Use Case Survey (A List of Facade Use Cases).
Collect and Document Nonfunctional Requirements.
Start the Business Rules Catalog.
Create a Risk Analysis.
Create a Statement of Work.
Begin Experimenting with User Interface Metaphors.
Begin User Interface Storyboards.
Get Informal Approval from the Executive Sponsor.
Tools.
The Use Case Diagram.
The Hierarchy Killer.
Use Case Name Filters.
Actor Filter.
Verb Filter.
Noun Filters.
Packages as Placeholders for Functionality.
Facade Filter.
Peer Review.
User Review.
Deliverables.
Roles.
Context.
Summary.
The Filled Iteration.
Objectives.
Steps.
Break Out Detailed Use Cases.
Create Filled Use Cases.
Add Business Rules.
Test the Filled Use Cases.
Put Some Things Off.
Tools.
The Stakeholder Interview.
IPA Filter.
White Space Analysis Filter.
Abstraction Filter.
Testing Use Cases with Scenarios.
Review.
Additional Use Cases.
Deliverables.
Roles.
Context.
Summary.
Focused Iteration.
Objectives.
What Are Focused Use Cases?
Steps.
Merge Duplicate Processes.
Bring Focus to Each Use Case.
Manage Scope Changes During This Iteration.
Manage Risks and Assumptions.
Review.
Tools.
Surplus Functionality Filter.
Narrow the Focus of the System.
Identify Surplus Functionality Inside the Use Case.
Vocabulary Filter.
Deliverables.
Roles.
Context.
Summary.
Managing Requirements and People.
Introduction.
Waterfall Lifecycle Management.
Nell and the Coffee Shop.
Disadvantages of Waterfall.
Alternatives to Waterfall.
Rapid Application Development (RAD).
Spiral.
Staged Delivery.
Holistic Iterative/Incremental (HI/I).
Introducing the…