log book gradingquality function deployment identify customer wants identify how the good/service...

Log Book Grading

•You can collect 5% of your overall grade during the course of thesemester by keeping a logbook and regularly recording entries

•I will periodically ask to see your log book over the semester•If I fail to see quality entries as time progresses, I will mark downfrom this 5%.

•I will collect the logbooks at the end of semester to assign a finalgrade

Engineering Design – The Process

Engineering Design:Exercise in Problem Solving

•Establish that there IS a problem•Understand problem

• Develop problem definition• Decide on the project requirements• Gather information (lit review / market research)

•Generate possible solutions – Idea generation•Evaluate solutions against requirements•Recommend one – where EGR386w ends•Test and Refine Prototype – where Capstone ends

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The Design ProcessProject

Defini-on andPlanning

Specifica-onsDefini-on

ConceptualDesign

ProductDevelopment

Product SupportCycle back

Progressforward

The Design Process

[1] G.E. Dieter and L.C. Schmidt, “Engineering Design,” in Engineering Design, 5th Ed. New York, NY: McGraw Hill,2013, ch. 1, pp. 15.

Why is a Design ProcessImportant?

•Quality• Ensures the product “works the way it should”

“Meets or exceeds my (customer’s) needs”

•Design process is the act of literally driving the product to ‘work theway it should’

•Final product meets the established design criteria

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Difficult to overcome “poor design” costs with “efficientmanufacturing” costs

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Design cost is relatively low

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Engineering Design

Best Learned by Doing

Project Definition

•Who is the client?

•What is the Original Problem Statement

•Who are the “stakeholders?”

•“Deliverables”— What is the final product delivered to the customer?– Design Proposal– Physical prototype?

• Functional or form only? Combination?– Virtual prototypes?

• Simulations and computer programs• CAD models

– Drawings?• CAD models, layouts, P&ID diagrams

– Presentation to customer?– Installation on site?

Project Definition: Decide on the Scope

•Scope is critical– How big is your obligation?– Where does your responsibility begin and end?

• Physically—in a system, building, product?• Details—Physical decomposition at top level, or all the way down to

literally each nut and bolt?• Commercial Off-the-shelf (COTS)?• Electrical and software control – designed from scratch, or COTS?

Who does the interface, and how deep?

Project Definition: Scope

The proposal documents a clear understanding of:– Client and stakeholders– Needs (the “What” they need)– Objectives, Constraints and Specifications (the “How” your design

satisfies these needs)•Final Proposal / Report

– Refined Pre-Proposal– Clear communication of design concept

• Physical• Functional• Analyses to make it work

•The “Final Proposal Document” becomes a contract to complete a job inthe real world

Project Definition: Within the Proposal

Project Definition: Ask Questions

• Clarify what the client wants

• What do the stakeholders (users) require?

• Are there any experts in the field?– State of the Art– Existing limitations

Project Definition:Identify Objectives and Constraints

• Need – The customer’s perceived (and oZen vague) lack ofresource, system or product

• Objec(ve – The design’s func-ons or characteris-cs that willaddress the Needs

• Constraint – A boundary condi-on on the problem. Limit thesize of the design space.

Project Definition:Assign weights to the objectives

Some Objec-ves more important than others! Weigh-ng should be on a 9, 3 or 1 basis.

9 is the most important objec-ve / constraint (limited to one or two objec-ves)

1 is the least important objec-ve

Team needs to agree on weigh-ng – strategies to come to an agreement Individual weigh-ng – average together

Majority vote while no-ng the minority voice

Objectives & Specifications

•Categorization of Objective– Readable– Understandable

•Specifications are the product/system characteristics that you canmeasure from your designed result – metrics by which to test theobjective– Calculations– Physical Prototype– Virtual prototype or simulation

Objectives & Specifications

•The more specifications you leave blank or unspoken,– Customer may set them for you– May lead to unrealistic expectations– Customer may reject proposal for incompleteness– This is YOUR CHANCE to control what you will be working towards.– Don’t let the customer make the project harder by setting the specs for

you!

Quality Function Deployment

Identify customer wants Identify how the good/service will satisfy customer wants Relate customer wants to product hows Identify relationships between the firm’s hows Develop importance ratings Evaluate competing products Compare performance to desirable technical attributes

QFD House of Quality

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ratingsratings

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House of Quality Example

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Deploying resources through theDeploying resources through theorganization in response toorganization in response tocustomer requirementscustomer requirements

House of Quality Sequence

log book gradingquality function deployment identify customer wants identify how the good/service...

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