As Class Convenes

1
As Class Convenes

• Find your team and sign the attendance sheet

2
Learning Objectives

• Achieve awareness of the difficulties in creating
  Metrics
• Achieve awareness of expectations concerning
  specifications and final concept

3
Session Agenda

• Creation of 20 min Metrics
• Specifications 15 min Selected Concept

4
Session Agenda

• Creation of 20 min Metrics
• Specifications 15 min Selected Concept

5
Metrics Are

• Quantifiable measures used to determine if the
  Needs are met (or how well the Needs are met)
• Dependent variables (e.g., the weight)

6
Metrics Are Not

• Physical descriptions of the Concept (i.e.,
  things that show what the Concept looks like)
• Design variables or parameters (e.g., length,
  width, height, tensile strength)

7
Creating Metrics

• Context development of a Water Pistol
• Needs shoots far, hard, straight easy to
  shoot doesnt hurt hand fast easy to refill
  holds lots of water not too heavy or big
• Task generate Needs-Metrics Matrix

8
Possible Needs-Metrics Matrix
9
Session Agenda

• Team Proposals 15 min
• general comments
• use of graphics
• Creation of 20 min Metrics
• Specifications 15 min Selected Concept

10
Two Questions About Specifications

• What are Specifications?
• specifications are the values of the metrics that
  define what is acceptable, i.e., feasibility
• How do you show your concept meets specs, i.e. is
  feasible?
• you must predict values for each specification

11
Concept - Specification Task

• For two of the Water Pistol metrics
• develop a model that would allow you to predict
  the metrics value
• highlight the design variables used in your model