PRESENTED BY GROUP 1 QUALITY FUNCTION DEPLOYMENT.

PRESENTED BYGROUP 1

QUALITY FUNCTION DEPLOYMENT

CONTENTS

• Evolution of quality and QFD• Definition• Benefits• Process• House of Quality• Using house of Quality• Application

Evolution of Quality and QFD

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QFD

QUALITY FUNCTIONDEPLOYMENT

QFD process defined by the“Voice of the customer” whilethe traditional approach the

specification is defined by the“Voice of the engineer”

Benefits of QFD

• Shorter development cycles

• Trade-offs are made in design, strategically, rather than in the market, tactically.

• Lower costs, increased productivity

• Documentation orientation

• Team involvement and commitment at thedesign stage

QFD Process

TechnicalRequirements

CustomerRequirements

ProductRequirements

TechnicalRequirements

ProcessRequirements

ProductRequirements

ControlRequirements

ProcessRequirements

Poor communications and expectations get lost in the complexity of product development.

Lack of structure or logic to the allocation of product development resources.

Lack of efficient and / or effective product / process development teamwork.

Extended development time caused by excessive redesign, problem solving, or fire fighting.

When is QFD Appropriate?

The Houseof Quality

Quality Function Deployment’sHouse of Quality

CustomerPerceptions

RelationshipsbetweenCustomer NeedsandDesign Attributes

Imp

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Ran

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CustomerNeeds

DesignAttributes

Costs/Feasibility

Engineering Measures

CorrelationMatrix

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Establishes the Flowdown Relates WHAT'S & HOW'S Ranks The Importance

Key Elements Informational

Elements

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Building the House of Quality1. Identify Customer Attributes2. Identify Design Attributes / Requirements3. Relate the customer attributes to the design

attributes.4. Conduct an Evaluation of Competing Products.5. Evaluate Design Attributes and Develop

Targets.6. Determine which Design Attributes to Deploy

in the Remainder of the Process.

Need 1Need 2Need 3Need 4Need 5Need 6Need 7

Key

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“W

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Voice of the CustomerVoice of the Customer

WhatsWhats

What Does The Customer Want Customer Needs Ys

1. Identify customer attributes

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Key

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Voice of the CustomerVoice of the Customer

How Important the What’s are TO THE CUSTOMER

Customer Ranking of their Needs

Customer

Importa

nce

Customer

Importa

nce


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Key

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Satisfing Customer NeedsSatisfing Customer Needs

How Do You Satisfy the Customer What’s

Product Requirements Translation For Action X’s HowsHows

WHAT'S HOW'SNeed 1Need 2Need 3Need 4Need 5Need 6Need 7

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2. Identify design attributes

Info

rmatio

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Corre

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Conflict ResolutionConflict Resolution

Impact Of The How’s On Each Other

Strong PositivePositiveNegativeStrong Negative

Correlation MatrixCorrelation Matrix


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Untangling The WebUntangling The Web

Strength of the Interrelation Between the What’s and the How’s H Strong

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1 Transfer Function Y = f(X)

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Relationships

Relationships


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3. Relating customer and design attributes

4. Add Market Evaluation & Key Selling Points

This step includes identifying importance ratings for each customer attribute AND evaluating existing products / services for each of the attributes

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Target Values for the How’s

Note the Units

How MuchHow Much


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5. Evaluate design attributes of competitive products &set targets

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The Best DirectionThe Best Direction

Information On The HOW'S More Is Better Less Is Better Specific Amount

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Target

DirectionTarget

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Key

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Ranking The HOW'SRanking The HOW'S

Which How’s are Key Where Should The Focus Lie “CI” = “Customer Importance” “Strength” is measured on a 9, 3, 1,

0 Scale

Technical Im

portance

Technical Im

portance

TI = column(CI *Strength)

CINeed 1Need 2Need 3Need 4Need 5Need 6Need 7

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6.Select design attributes to be deployed in the remainder process

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Key

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Com

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Have We Captured the HOW'SHave We Captured the HOW'S

Are All The How’s Captured Is A What Really A How

Completeness Crit

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Completeness Crit

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CC = row

(CI *Strength)

CINeed 1Need 2Need 3Need 4Need 5Need 6Need 7

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Using the House of Quality

The voice of the customer MUST be carried THROUGHOUT the production process.

Three other “houses of quality” are used to do this and, together with the first, these carry the customer’s voice from its initial expression, through design attributes, on to component attributes, to process operations, and eventually to a quality control and improvement plans.

In Japan, all four are used.

The tendency in the West is to use only the first one or two.

The Four Houses of Quality

The Cascading Voice of the CustomerNOTES: “Design Attributes” are also called “Functional Requirements”“Component Attributes” are also called “Part Characteristics”“Process Operations” are also called “Manufacturing Processes” and the “Quality Control Plan” refers to “Key Process Variables.

WHA

TS

HOWS

X

YCritical to QualityCharacteristics(CTQs)

Key ManufacturingProcesses

Key Process Variables

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3(l) House of Quality Pros and Cons

Pros: Generates specific technical requirements Requirements are traceable Follows a repeatable, quantitative process Effectively translates Voice of the Customer Records rationale for each technical requirement

Cons: Time-consuming process for >10 requirements Data storage, manipulation and maintenance costs Very dependent on customer requirement gathering Inflexible to changing requirements; must recalculate

Thank you

PRESENTED BY GROUP 1 QUALITY FUNCTION DEPLOYMENT.

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Transcript of PRESENTED BY GROUP 1 QUALITY FUNCTION DEPLOYMENT.