Table of Contents

1   The Sorcerer's Apprentice

Example: Designing a Multimedia System

Guiding and Coordinating Discovery

Example: Designing a Library System

Identifying the Real Problem

Thriving on Design

2   What is Design?

Clarifying the Problem

Identifying Design Moves

Envisioning the Solution

Recognizing Trade-offs and Dependncies

Integrating Diverse Knowledge and Skill

Anticipating Impacts on Human Activity

Design Is Hard

3   Scenario-Based Design

What Are Scenarios?

Challenge: Design Action Competes with Reflection

Scenarios Evoke Reflection in Design

Challenge: Design Situations Are Fluid

Scenarios Are at Once Concrete and Flexible

Challenge: External Factors Constrain Design

Scenarios Promote Work Orientation

Challenge: Design Moves Have Many Consequences

Scenarios Have Many Views

Challenge: Technical Knowledge Lags Design

Scenarios Can Be Abstracted and Categorized

Toward a Scenario-Based Framework for Design

4   Example: Video Information System

Raison d'Etre

Clarifying Design Concerns and Objectives

Envisioning Alternative Situations

Managing Consequences and Trade-offs

Creating and Using Design Knowledge

Staying Focused on People and Use

5   Example: Programming Tutorial and Tools

Design Context

Design Analysis

Environment: Bittitalk Browser

Environment: View Matcher

Development:MiTTS

Deployment and Evaluation

6   Usability Rationale

Claims and Requirements for the Touchstone Scenario

Designing and Analyzing a New Touchstone Scenario

Identifying Appropriate Goals

Sustained Learning

Consequences for Work Groups

The Place of Claims Analysis in Scenario-Based Design

7   Cumulative Design

A View Matcher for Reuse

Principled Emulation of a View Matcher

Activity Modeling in the MoleHill Guru

Genre Specialization in the MoleHill Goalposter

Envisioning and Refining the Goalposter

Design Patterns and Design Models

8   Evaluation and Theory Building

Evaluation Goals and Methods

Evaluating and Developing Design Genres

Attributions to Multiple Theories

Remote and Distributed Causes

Thread-Level Claims

Evaluation-Driven Design

9   Software Development

Object-Oriented Software

Responsibility-Driven Design

Developing Object Models from Scenarios

The Scenario Browser

The Specification-Implementation Gap

10   Finding Scenarios and Making Claims

Where Do Scenarios Come From?

How to Make Claims

Managing Scenarios and Claims

11   Getting Around the Task-Artifact Cycle

Scenario-Based System Development

MiTTS Again

Requirements Development in LiNC

Toward a Scenario-Based Methodology

12   The Scenario Dilemma

Some Status on Scenario-Based Design

Challenges for the Future

No More Sorcerers