ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 1 Bruce Mayer, PE Engineering-11: Engineering Design Bruce Mayer, PE Licensed Electrical & Mechanical Engineer Engineering 11 Defining Design Prob

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 2 Bruce Mayer, PE Engineering-11: Engineering Design Recall the Design-Process Formulating Problem Generating Alternatives Analyzing Alternatives Evaluating Alternatives ReDesign Iteration  What, Exactly, is a “Design Problem”

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 3 Bruce Mayer, PE Engineering-11: Engineering Design Engineering Design Problems  Engineering Designs Generally Fall into Two Broad Categories Remedial New Product  Remedial Problems There is a Clearly Identified Issue with An Existing Product or System – A Solution is Needed NOW –Basically IMPROVEMENT or Trouble-Shooting  e.g., Toyota Gas Pedal Recall

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 4 Bruce Mayer, PE Engineering-11: Engineering Design NewProduct Design Problems  Generally a “Clean Sheet” Process  Requirements Specified Quite Broadly  Require The Maximum Application of Engineering Capability Creativity Quantitative & Graphical Skill Teamwork Application of Science & Mathematics See also:

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 5 Bruce Mayer, PE Engineering-11: Engineering Design Types of Design Problems  Remedial CURRENT Product Does NOT Work Describe as “Product Deficiency” Tightly Focused Engineering Design  New Product CURRENT Product Does NOT Exist Describe as “Product Opportunity” Open-Ended Engineering Design

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 6 Bruce Mayer, PE Engineering-11: Engineering Design What is a “Product”  One Definition of a “Product” ≡ An item that is purchased & used as a UNIT  Some Examples of Products  Cell Phone  Brick  Coffee Maker  Propane Blow Torch  Oil Tanker  UV MicroScope  WhiteBoard Marker  Milling Machine  Door Stop  Peeled Potato Sorter  F22 Fighter Jet  Digital OscilloScope

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 7 Bruce Mayer, PE Engineering-11: Engineering Design Anatomy of a Designed Product  Component ≡ A identifiable “piece”, or SubSet of a larger System or Object  The Classes of Components that Comprise the Design of a typcial Physical (touchable) Object Parts –A “Part” is typically a MonoLithic Object that canNOT be NonDestructively DisAssembled SubAssembly –Comprised of “Parts”, can be DisAssembled

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 8 Bruce Mayer, PE Engineering-11: Engineering Design Anatomy of a Designed Product  Two Classes of Parts Purchased, or Standard Parts –Typically SELECTED from a CATALOG –Also called “Off the Shelf” parts Designed, or Special-Purpose Parts (a.k.a., “Piece Parts”) –Designed for a Specific-Need –Typically “Fabricated” from “BluePrint(s)” –May Become a Standard Part if it has a broad market; it then enters the “Catalog”

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 9 Bruce Mayer, PE Engineering-11: Engineering Design Example Standard Part (McMaster-Carr) Catalog Ordering Number

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 10 Bruce Mayer, PE Engineering-11: Engineering Design Anatomy of a Designed Product  Similarly Two Classes of SubAssys Purchased, or Standard SubAssys –Typically SELECTED from a CATALOG –Also called “Off the Shelf” assemblies Designed, or Special-Purpose SubAssy –Designed for a Specific-Need –Typically Special and/or Standard Parts “Assembled” (Put ToGether) from “BluePrint(s)” –May Become a Standard SubAssy if it has a broad market; it then enters the “Catalog”

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 11 Bruce Mayer, PE Engineering-11: Engineering Design Example Std SubAssy (Grainger Insdustrial) Catalog Ordering Number

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 12 Bruce Mayer, PE Engineering-11: Engineering Design Design (De)Composition  During the Case Study we saw how the “chunks” of the design could be broken- down or “DeComposed” in Categories Purchased/Standard Catalog-Parts Designed Piece-Parts Purchased/Standard SubAssys Designed SubAssys –ThemSelves “composed” of Standard & Designed Catalog/Piece Parts

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 13 Bruce Mayer, PE Engineering-11: Engineering Design Reverse Engineering  The first step in Analyzing an Existing Design is the DeComposition of the “chunks” that comprise the design.  Example: “Simple” Carrot Grater & Chipper

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 14 Bruce Mayer, PE Engineering-11: Engineering Design DeCompose Grater/Chipper Designed SubAssy Purchased SubAssy Designed PiecePart Purchased CatalogPart

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 15 Bruce Mayer, PE Engineering-11: Engineering Design Process/Manufacturing Plants  Engineers also Design Process & Manufacturing Plants” (Usually called “Factories”)  Plants themselves are usually not regarded as “Products”; instead they PRODUCE Products  Plants are LARGE systems that take Inputs and Add Value to Make or Produce a Product

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 16 Bruce Mayer, PE Engineering-11: Engineering Design Plant Examples  The inputs to Almost ALL plants Raw or Partially Finished MATERIAL ENERGY- typically Electrical or Thermal Human LABOR  Examples Pickle Factory –Main Materials: Cucumbers, Water, Salt, Spices Automobile – Extremely Sophisticated Gasoline Refinery – Matl is Crude Oil

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 17 Bruce Mayer, PE Engineering-11: Engineering Design Plant Design  Plants are almost always “Custom” i.e.; they are “One-of-a-Kind”  Plant Design Engineers Use Slightly Different Terminology than do Product Design Engineers  Product Designers Sub ASSEMBLIES PARTS  Plant Designer Sub SYSTEMS EQUIPMENT –a.k.a. (Machine) Tools

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 18 Bruce Mayer, PE Engineering-11: Engineering Design PLA Plant Design by M. Quemada See also 10_Into_to_Engrng/E10_Guest_Speakers/MQuemada_Chabot_ENGR10_Fa08.ppt  PLA (Poly Lactic Acid, derived from corn) is a nano- composite biodegradable material It is free of synthetic resin and degrades completely in the natural environment. PLA provides similar properties to Nylon, PS, PP, & PE

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 19 Bruce Mayer, PE Engineering-11: Engineering Design Space Heater Decomposition Electrical Space Heater Fan Blade Assy Motor Enclosure Housing Guard Screen Electrical Controls Fan Switch Heater Switch TipOver Switch Power Cord Heating Element Ceramic BackPlate NiChrome Wire

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 20 Bruce Mayer, PE Engineering-11: Engineering Design DeComp Diagram Utility  Understand the interaction between components  Consider standard parts versus special purpose parts (buy vs. make)  Divide the design problem into separate sub-problems; i.e., identify decisions.  Analyze the Strengths & Weaknesses of existing Designs for products or processing/manufacturing plants

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 21 Bruce Mayer, PE Engineering-11: Engineering Design Types of Engineering Design  ReDesign  modifying the “form”  Selection Design  choosing from existing standard parts/subassemblies  Variant Design  modifying existing part or subassembly, but keeping original concept  Adaptive Design  adapting known solution to new task  Original Design  new concept, part/product never existed before Easier Harder

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 22 Bruce Mayer, PE Engineering-11: Engineering Design NOT Engineering Design  Artistic Design  “Curb Appeal” “Industrial Designers” are the “Architects” of Engineered-Product Design –Determine QUALITATIVELY the FORM (size & shape) and FEEL (color & texture) but Do NOT Apply Science & Math  Tinkering  to work in the manner of a tinkerer; especially: to repair, adjust, or work with something in an unskilled or experimental manner (No Sci/Math)

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 23 Bruce Mayer, PE Engineering-11: Engineering Design Industrial Design  No No.s (few anyway)

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 24 Bruce Mayer, PE Engineering-11: Engineering Design Type of Design by Phases Detail Design Parametric Design Configuration Design Detail Design Parametric Design Detail Design Formulation Concept Design Detail Design Parametric Design Configuration Design variant design selection design original design adaptive design

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 25 Bruce Mayer, PE Engineering-11: Engineering Design Summary  Products and Process-Plants have an anatomy of components  Components include parts & subassemblies  Process-Plant components include systems and equipment  Components can be standard or special purpose  Component decomposition diagrams can be very useful  Types of design include: original, variant, selection, adaptive, redesign  Artistic-Design & Tinkering are not really Engineering design

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 26 Bruce Mayer, PE Engineering-11: Engineering Design All Done for Today CCA Math Class MATHS200 Mathematical Ideas Mathematical ideas have always influenced societies, and artists are often among the first to explore and express their meanings and implications. This course presents a variety of mathematical ideas from across cultures and times, particularly those that are still useful to artists, craftspeople, architects, and designers, from the mathematics of nature to modern computers. Each class involves visual presentations and hands-on activities from the course reader/workbook for exploring mathematical ideas. Homework each week involves creating something original to demonstrate an understanding of the mathematical ideas. The textbook supplements the ideas and helps prepare for upcoming class sessions.  These 3 Units of Math are Required for the BA in Industrial Design

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 27 Bruce Mayer, PE Engineering-11: Engineering Design Bruce Mayer, PE Registered Electrical & Mechanical Engineer Engineering 11 Appendix

ENGR-11_Lec-02_Chp2_Fomulate_Design.ppt 28 Bruce Mayer, PE Engineering-11: Engineering Design Degrees from CCA