1. Informatics 121 Software Design I
Lecture 2 André van der Hoek
Duplication of course material for any commercial purpose without the explicit written permission of the professor is prohibited.
December 8, 2018 – 17:35:31
(c) 2007 University of California, Irvine – André van der Hoek

2. © 2007 University of California, Irvine – André van der Hoek
Today’s Lecture
One design exercise
Reflection
Second assignment
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

3. © 2007 University of California, Irvine – André van der Hoek
Five Teams
Team 1
Cameron
Sen
Mathew (not here)
Vinh
Michael Y.
Team 3
Jeremiah
Jan
Michael L.
Thomas
Arthur
Team 5
Aurora
Danish
Peter
Linda
Team 2
Jonathan
Jacob
Rick
David S.
Nick
Team 4
Nathan
Subodh
David P.
Mohit
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

4. Your Third Design Exercise
Build a structure that spans two bases…
…such that the distance between the two bases is maximized…
…out of Play-Doh, wire, paper, and dowels…
…using tools as necessary…
…in 1 hour
(we will take some pictures)
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

5. Your Third Design Exercise – Available Materials
10 dowels
4 feet of wire
10 sheets of paper
3 large cans of Play-Doh “stuffed to the brim”
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

6. Your Third Design Exercise – Constraints
The structure must be able to suspend, above the height of the base and for 15 seconds, one large can of Play-Doh
in the middle of the structure
in one other place on the structure of your choosing
not overlapping with a base
not overlapping with middle of the structure
The paper and dowels must remain in one piece
The structure as built should reflect the design as closely as possible
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

7. Your Third Design Exercise – The Process
Design: 20 minutes
Present: 1 minute each (5 minutes total)
Build: 10 minutes
Re-design: 10 minutes
After the hour, the final structure has to stand
You are given access to sample materials
The structure with the largest span between the two bases “wins”
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

8. © 2007 University of California, Irvine – André van der Hoek
Reflection
How does what you finally built differ from what you presented at first?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

9. © 2007 University of California, Irvine – André van der Hoek
Reflection
What did you learn during the first build phase that influenced your re-design?
What did your re-design phase focus on?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

10. © 2007 University of California, Irvine – André van der Hoek
Reflection
How closely did you follow your designs?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

11. © 2007 University of California, Irvine – André van der Hoek
Reflection
How much could you reuse from one version to the next?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

12. © 2007 University of California, Irvine – André van der Hoek
Reflection
What influence did the constraints have?
Limited dowels?
Supporting Play-Doh?
Two spots for the can?
Nature of the bases?
20 total minutes to build
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

13. © 2007 University of California, Irvine – André van der Hoek
Reflection
Would you have rather had one long, 40 minute, building phase?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

14. © 2007 University of California, Irvine – André van der Hoek
Reflection
How much could you draw upon your existing knowledge of bridges?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

15. © 2007 University of California, Irvine – André van der Hoek
Reflection
Which representation(s) did you use while designing?
Why did you create representations?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

16. © 2007 University of California, Irvine – André van der Hoek
Reflection
How did you know what would / would not work?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

17. © 2007 University of California, Irvine – André van der Hoek
Last year…
Similar?
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

18. © 2007 University of California, Irvine – André van der Hoek
Second Assignment
Each team should create a design for a bridge using a single set of Geomag magnetic sticks and balls.
The bridge must span an 8 inch gap, across the bases from today’s exercise.
The bridge must be able to suspend a large can of Play-Doh at an arbitrary spot on the bridge.
The cost of the bridge should be minimized. Each stick and each ball cost one thousand dollars.
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

19. © 2007 University of California, Irvine – André van der Hoek
Second Assignment
On Tuesday, bring a description of your design to class.
This description must be text only. This is important. The description must be text only.
Another team will build the bridge according to this design, and will have 20 minutes to do so.
The design team and build team will not be able to communicate or clarify anything with each other.
The designers and builders of the lowest cost bridge that spans 8 inches and supports the can of Play-Doh will win.
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek

20. Second Assignment – Caveat
There will be a change, announced in class before the building of the bridge commences. The change may involve a change in price, maximum components available, the length required, or something else entirely.
The build team will need to improvise to address the change.
If you want to win as a design team, you should make your design as robust and flexible as possible.
BRING YOUR SET TO CLASS!
December 8, 2018 – 17:35:31
© 2007 University of California, Irvine – André van der Hoek