1. Prototyping

2. Technological Design Is a distinctive process with a number of defining characteristics:  It is purposeful  It is based on certain requirements  It is systematic  It is iterative  It is creative  There are many possible solutions

3. Software Software complexity adds unreliability, since the new features cannot always be tested adequately before release.

4. In the last 15 years alone, software defects have: Wrecked a European satellite launch ($500 million) Delayed the opening of the hugely expensive Denver airport for a year Destroyed a NASA Mars mission Killed 4 marines in a helicopter crash Induced a U.S. Navy ship to destroy a civilian airliner Shut down ambulance systems in London, leading to as many as 30 deaths. (Charles Mann, 2002, p. 34)

5. The software industry provides an unusually clear example of why we may wish to reexamine our concept of a finished product because of the incredible disregard for the time and convenience of the customer. Another reason is that product cycles have become so short that even customers who must stay up-to-date may miss several generations of a single product.

6. Design is a never ending process, interrupted by a decision to package or “shrink wrap” for a time, or “go to press,” or “fire up the line.” During production, a design is “frozen” in time, but even then, minor improvements are possible and often essential.

7. What is a Prototype? It refers to an unfinished design, an unrefined design, or a pre-production model. It is a first physical form or service description of a new product, still in rough or tentative mode. With regard to services, a prototype is simply the first full description of how the service will work, and comes from the systems design or development function.

8. Dude – What’s a prototype? A working model used to test a design concept by making actual observations and necessary adjustments. (Standards for Technological Literacy, 2000) Prototyping helps determine the effectiveness of a design by allowing a design to be tested before it is built. McLellan Engineering, Inc.

9. Prototype and the Design Process The first step in the design of anything is defining the problem and identifying the requirements The most often repeated error is failing to pursue more than one design alternative

10. Prototype Examples Original Army Jeep Prototype Hummer Prototype GMC Motors Bantam Motors

11. Prototypes of Complex Systems With complex products, there may be component prototypes as well as one complete system prototype. Individual subsystem prototypes are constructed separately. This way, if one part needs serious modification, it can be changed without redesigning the overall system.

12. Categories of Prototypes 1. Mechanical Prototypes 2. Graphic Design Prototypes 3. Architectural Prototypes 4. Electronic Prototypes 5. Combination Prototypes 6. Rapid Prototyping

13. Mechanical Prototypes After a sketch is created, the sketches can then be refined using a 3D modeling program and then shared with others by printing it. Once this is done, the rest of the tools and materials used will vary. Mechanical prototypes are sometimes of limited value unless combined with other systems.

14. Mechanical Prototypes Begins with a need or problem. Solution and Criteria Sketch or Model Kelvin Technology http://www.lakeplacidsports.com/

15. Zach Smith Designs

16. Graphic Design Prototypes Includes posters, brochures, booklets & displays First, at least 3 design concepts must be explored or sketched crudely with pencil or colored pencils. Next a full-size or rough layout is produced, usually only in 1 color. A finished layout is finally produced in color as accurately as possible for evaluation. Using computers, digital cameras, scanners and color laserprinters.

17. http://www.vfs.com/gallery.php?id=13&cat egory_id=50&project_id=825 http://www.vfs.com/gallery.php?id=13&cat egory_id=50&project_id=825 Monarch Trading Inc. Junkmail Magazine Magellan Coaching Examples

18. Architectural Prototypes The real object is so large that the prototype must be a fraction of the finished size. The term model or scale model may be appropriate Homes, office buildings, apartments, etc.

19. Architectural Prototypes Fraction of the size of the real object. Scale of 50 to one or 110 to one. Zach Smith Designs

21. Electronic Prototypes Electronics are part of everything that we touch A first generation prototype is usually constructed with a solderless breadboard. Second generation prototypes are the printed circuit boards.

22. Electronic Prototypes Prototypes of Electronic devices. Solderless bread board where you can experiment with the device.

23. Combination Prototypes Often you must combine several kinds of prototypes. Example: Using Graphic, Electric and Mechanical together for 1 product.

24. Rapid Prototyping Sometimes called 3D printing Using a machine, you can produce a physical 3- dimensional part from a computer file called a.stl file..stl = Stereo Lithography It has been around several years, but has been limited mainly by cost considerations Can be completed in only a few hours.

25. Rapid Prototyping Called 3-D printing You can produce a three-dimensional part from a computer file. The parts can be the same size as the real object. Stratasys, inc.

26. How its done! The Printer reads in data from a CAD drawing, and lays down successive layers of liquid or powdered material, and in this way builds up the model from a long series of cross sections. Just think of your inkjet printer adding layers of material onto your paper. The word "rapid" is relative: The printing machines typically takes 3 to 72 hours, depending on machine type and model size. stratasys

27. Rapid Prototyping Examples