design selection_2.ppt

7/28/2019 design selection_2.ppt

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Project Selection and

Needs Identification


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Identifying Design Category Creative

New and innovative design

Variant

Variation of existing design

Improve performance

Add more features

Routine

Well known

Combine creativity and new technologies

Complex


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Design Type Differences Each Design category can fall in one of the following types

Technical evaluation project

Use of new technology

System test

Ensure meeting all the needs

Experimental design project

Find system characteristics

Analytical projects

Find failure modes and probability of failures

Applied research project

Creation of new technology based on existing ones

Fundamental Research Project

Discover new scientific principles


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Project Selection Criteria

Questions to ask! What are you trying to do? Articulate your goals

How is it does today? Limitations?

What difference does it make? Who cares? What are the risks and payoffs?

How much will it cost?

How long does it take? What are the benchmarks to check for success?


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Creating AHP Model Determine the selection criteria

Your interests; technical complexity; creativity;

innovation; marketing potential; etc. Determine the weighting for each criteria

Create the AHP

Review the scores and adjust as needed!


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Creating AHP Model


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Identify the Needs What is the problem?

Dont fall for a wrong problem

Make sure problem and solutionare not given to you!You haveno design there!

Understand the problem and

need Do you have a design space

all possible solutions

Problem of

Eliciting

needs

Marketing

Spec.

Engineering

Spec.


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Process to obtain

Voice of the Customer Gather raw data from users

What are the pros and cons of the existing process

Understand the process and problem

Interpret the raw data in terms of needs (Need)

What is the customer requirement (marketing specification) Not quantifiedthey use terms such as: good, easy, user friendly, etc.

Design an audio device that is portable, easy to use with high quality. (extension)It should be water resistance, long lasting, small and drop resistance.

Quantify the needs (Tree) Establish an objective tree

Ranking the relative importance of each specification

Understand the background and existing solutions (Survey) Use all available resources: Internet, Technical, Journals, Government

statistics, etc.


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Example of

Objective Tree


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Sources for Survey EE Product Center, www.EEProductCenter.com. A website for locating electronic components and

their manufacturers. It provides links to product datasheets and application notes. It has a keywordsearch engine and a tree structure search for finding components. For example, you can start with opamps and delve into subcategories such as precision and high-speed.

Circuit www.CircuitCellar.com. This companion website for the magazine is a great reference fordesigners. It emphasizes embedded systems and electronics projects with many tutorial articles andproject ideas.

Datasheet Catalog, www.DatasheetCatalog.com. A datasheet source for electronic components andsemiconductors.

Dr. Dobbs, www.ddj.com. The magazine and companion website are a resource for software developersthat includes tips and tutorials.

EE Times, wLuw.EETimes.com. Industry newspaper for the electrical engineering field withinformation on current technology developments.

Electronic Magazine, wwro.EDNmag.com This is a free magazine for electrical design engineers thatprovides information on the latest products. The website has a number of categorized technical

resources and a design ideas section. OK Semiconductor, www.OnSemi.com. OK Semiconductor is a supplier of semiconductors for a wide

range of applications, with a particular emphasis on power management. The website has a searchabledatabase of over 15,000 components, and provides guidelines for component selection based ondifferent applications.

The Thomas Register, www.ThomasRegister.com. This is a source for finding companies and productsin Korth America. It allows searches for parts and equipment that may be used in a design project. Itprovides profiles of companies that meet the search criteria and describes the products they make.
http://www.eeproductcenter.com/http://www.circuitcellar.com/http://www.datasheetcatalog.com/http://www.onsemi.com/http://www.thomasregister.com/http://www.thomasregister.com/http://www.onsemi.com/http://www.datasheetcatalog.com/http://www.circuitcellar.com/http://www.eeproductcenter.com/


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Summary

Design

Catagory

Project

Type

Selection

Criteria

Identify

The Needs

Solution

Space

Objective

Tree

Research

Survey

Needs &

Objectives


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Assignment

Individual: Pick a project topic (anything)Define

your different criteria in order for this project to be

an interesting project to you (meeting a need, low

cost, innovative, patentable, etc.) Create an objective

tree for the topic. You must present this in class.

As a team agree on two possible project ideas.

Create an objective tree for each project idea. Try toagree on which project seems to be more viable.

design selection_2.ppt

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