Ch. 14: Prototyping

Prototyping

• Approximation of the product along 1+ dimensions of interest

• : Concept sketches, models, test components

Physical Prototypes

• Tangible approximation

• Some behaviour may be an artifact of the approximation

• Best for communication of idea

• : Legos

Analytical Prototype

• Mathematical model of the product

• Only exhibit behaviours of modelled

• Allow more experimental freedom

• : 3D rendering, simulations

Focused Prototype

• Implement one or few attributes of the product

• Answer specific questions about the design

• Several are required

• : Foam model

Comprehensive Prototype

• Most or all attributes of product

• Opportunities for rigorous testing

• Best for milestones and integration

• Full scale and fully operational

Four Uses of Prototypes: Learning

• Answering questions about performance or feasibility

• : Will it work? Meeting customer needs?

Four Uses of Prototypes: Communication

• Demonstration of product for feedback

• Enrich communication with top management, vendors, customers, investors, etc

• : 3D models

Four Uses of Prototypes: Integration

• Ensure components and subsystems work together

• : Alpha, Beta and Gamma tests

Four Uses of Prototypes: Milestones

Tangible goals, show progress and enforcing schedule

CAD

• Computer aided design

• Modelling and analysis

• Digital Mockups

3D Printing

• Stereolithography technology

• Create models out of plastic

Planning for Prototype

1. Define purpose

2. Establish level of approximation of the prototype

3. Outline an experimental plan

4. Create schedule for procurement, construction and testing