SMJ 3513 © Dr. MKAJ 1 Lecture 3 Design Process & Design Methods.

1 SMJ 3513 © Dr. MKAJ

Lecture 3Lecture 3 Design Process & Design Process & Design MethodsDesign Methods


Design Process vs. Design MethodsDesign Process vs. Design Methods

Design Methods – the techniques employed during design proces

Design Process – a series of processes involving identification of needs, planning, setting up specifications, conceptualization and product development


Recognition of Need

Problem Definition

Concept Generation

Detail Design

Manufacture

Market

Design ProcessDesign Process

Concept Evaluation Decision matrix, ranking & weighting techniques

Brainstorming, synectics, analogy, morphological charts, functional analysis

Literature search, investigation, interviews, observation, questionnaires, testing, data/information collection, demand/wish/constraints, product design specification (PDS)

Value Engineering, Design for X’s, Failure Mode & Effect Analysis (FMEA), CAD/CAE

Design Design MethodsMethods

Quality Engineering, Design of Experiment, Product Testing


Stage 1: Stage 1: Recognition of NeedRecognition of Need

Most needs are ill-defined Very vague – unclear!

Too broad – no boundary, too general, lack specific

Designers must be certain No assumption – “ I think this is the way to do it...”, “I think

the user will like it…”

Need facts and figures


Stage 2 – Stage 2 – Problem DefinitionProblem Definition

Also called Clarification of Task – to clearly define the ill-defined need/problem

Common methods: Literature search Investigation, interviews, observation, questionnaires, testing,

data/information collection Demand/wish/constraints Product Design Specification (PDS)


Example – Example – Problem DefinitionProblem Definition

Problem StatementYou have been given a task to design a battery-operated car jack for domestic market. The product must not exceed RM 300/unit. It should be easy to use, lightweight and portable.

Battery operated

Domestic market

Easy to use

Lightweight

Portable


Problem Definition: Problem Definition: Car JackCar Jack

Battery operated – Cigarette lighter? Direct to car battery? Amperage? Voltage? Car battery capacity?…..

Domestic market – user? Class of car? Type of car? Age group? Income group? Gender? Tonnage? Mounting point? Existing Design? Competitors? …

Easy to use – operation time? Height? Size? Storage? Weight?

Lightweight – How light? Existing Design?

Portable – Storage? Case? Target car storage capacity? Location of storage?


Wrapping up Problem Wrapping up Problem Definition StageDefinition Stage

After exhaustive effort of defining the problem, you must have a better idea about your design boundary. Then you should sit down and prepare the REQUIREMENTS of your design:

Design Objectives, Wish lists, Constraints Product Design Specification (PDS) – Prof. Stuart Pugh


Stage 3 – Concept GenerationStage 3 – Concept Generation

This is the most difficult and critical stage in design

Need to employ CREATIVITY and INNOVATIVENESS


STOP HERE!STOP HERE! Let’s have fun! Let’s have fun!

Mini Project (30%)You need to design a ‘device’ that can prevent a raw chicken egg from breaking when it is thrown from the first floor of C23. This ‘device’ must:

Use recycle material and must not exceed 500 g (including the egg) Be original and ‘home grown’- no ‘ready-made’ device Be purely mechanical


ExpectationExpectation

Due in 2 weeks from today Progress and developmental work - problem

definition, concept generation, evaluation criteria.

Demonstrate some level of critical thinking - ability to relate to the basic concepts of engineering

Originality Functionality


DeliverablesDeliverables

Prototype Developmental sketches Simple report Short Oral Presentation


Grading CriteriaGrading Criteria

is the design creative? is the design well engineered? The employment of

basic engineering analysis and concept does the design adhere to the specifications and meet

all the constraints? quality of the design report – is it well-written, well-

structured, and contain all necessary information? quality of the oral presentations participation in the weekly meetings


Idea Generation TechniquesIdea Generation Techniques

Use Brainstorming Analogical Thinking – relate to events or situations or

objects surrounding you

Selamat Mencuba!Selamat Mencuba!

SMJ 3513 © Dr. MKAJ 1 Lecture 3 Design Process & Design Methods.

Documents

Transcript of SMJ 3513 © Dr. MKAJ 1 Lecture 3 Design Process & Design Methods.