Chapter+8

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Introduction
Scenarios are effective at dealing w/five key problems of design
 * 1) External factors that constrain design such as time constraints, lack of resources.
 * 2) Design moves can have many effects and create many possibilities
 * 3) Scientific knowledge and generic solution lag behind specific situations.
 * 4) The importance of reflection and action in design
 * 5) The slippery nature of design problems

Types of scenarios
User stories
 * Real world experiences, ideas, anecdotes and knowledge of people.
 * Usually rich in context and captures seemingly trivial details usually left out.

Conceptual scenarios
 * More abstract àsimilar stories are combined together (2 or more people can talk about how they like to use pencils and then combine the generality of both stories to create a scenario)
 * Little to no specification of precise technologies.

Concrete scenarios
 * Generate specific elaboration of scenario
 * Begins to dictate a particular interface design and a particular allocation of functions between people and design.
 * Useful for prototyping.

Use cases
 * Describes the interaction between people and devices
 * Need to describe what people do and what the system does.

Scenarios– basic concept is to apply PACT analysis when doing scenarios to keep it organized.

**Scenario Based Design method**
Requirement and problems
 * In gathering user stories and scenario information it will help establish requirements (qualities or functions that any new product or system should have).

Scenario Corpus Conceptual Model
 * In design a corpus of scenarios the idea is to uncover the dimensions (who uses the design, what domains will it be operated in, are there any media or data types that need to be accommodated for)
 * Shows the main objects in the system, their attributes and the relationships that exist between them.
 * Will form the basis of the information architecture of a system.

Design Language
 * Produces a set of standard patterns of interaction and all the physical attributes of a design (colours, shapes, icons etc)
 * Combined with the conceptual model and the “look and feel” of the design is completed.