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quality control part II
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2012 INSTITUTE OF TECHNOLOGY PETRONAS SDN BHDAll rights reserved. No part of this document may be reproduced, stored in a retrieval system or transmitted in any form or by any means (electronic,mechanical, photocopying, recording or otherwise) without the permission of the copyright owner.
UniversitiTeknologiPETRONASFacultyofEngineeringChemicalEngineeringDepartment
byIr Dr Abdul Halim Shah Maulud
Chemical Engineering DepartmentEmail : [email protected] Room : 05-03-06
DesignforQuality PartII
EngineersinSocietyVBB4043Maysemester,2014
Objectives
Todesignforqualityviaqualityfunction
deployment(QFD).
Todiscussthehouseofquality.
2
DesignforQuality&Reliability
Preventproductfailuresratherthanreacttothem. Createtheculturetodesignqualityandreliabilityintotheirproducts
Useproductdevelopmentteamstoensurethatthequalityandreliabilityissuesproperlyrepresented
Understandindetailthecapabilitiesandlimitations.
3
4
Requires answer to set of questions :
- What are the functions customer wants?- What are the capabilities of current products?
- Are there better material available?
- How much the product cost for successful marketplace?
- What are critical attribute of performance?
- How much performance does customer want?
Design for quality
BenefitsofQFDo ImprovesCustomerSatisfaction
oCreatesfocusoncustomerrequirementsoUsescompetitiveinformationeffectivelyoPrioritizesresourceso Identifiesitemsthatcanbeactedupono Structuresresidentexperience/information
o ReducesImplementationTimeoDecreasesmidstreamdesignchangeso LimitspostintroductionproblemsoAvoidsfutureapplicationopportunitieso Surfacesmissingassumptions
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BenefitsofQFD
o PromotesTeamworkoBasedonconsensusoCreatescommunicationatinterfaceso IdentifiesactionsatinterfacesoCreatesglobalviewoutofdetails
o ProvidesDocumentationoDocumentsrationalefordesigno IseasytoassimilateoAddsstructuretotheinformationoAdaptstochanges(alivingdocument)oProvidesframeworkforsensitivityanalysis
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Qualityfunctiondeployment,(QFD)
Translatecustomersrequirementintofunctionaldesign#voiceofcustomer
QFDapproachbyDrS.Mizuno fromTokyoUniv.isusedthroughouttheworld
QFDimplementation houseofquality stepbystepproceduretoseehouseofqualityisdevelopedandanalyzed
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HouseofQualityC
usto
mer
requ
irem
ents
(v
oice
of t
he c
usto
mer
)
Leftwall Voiceofcustomer,whatcustomerexpects
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Technical descriptors (voice of the organization)
Relationship between requirements and descriptors
Prio
ritiz
ed c
usto
mer
re
quire
men
ts
Interrelationship Between
Technical descriptors
Prioritized technicaldescriptors
Right wall Prioritized customer requirement
Ceiling - Technical descriptors
Interior walls Relationship between requirements and descriptors
Roof - Interrelationship between descriptors
Foundation Prioritized technical descriptors
Measure Target
Ranking
Measure
Target
Wt.
Quality Function Deployment
DESIGN FEATURES
INTERACTIONS
CUSTOMER REQUIREMENTS DEPENDENCIES
BuildingHouseofQuality
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BuildingHouseofQuality
Step1Listcustomerrequirements (WHATs) Customers needsor
expectationsPrimarySecondary
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BuildingHouseofQuality
Step2Listtechnicaldescriptors (HOWs) Counterpartcharacteristics
Primary Secondary Tertiary
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BuildingHouseofQuality
Step3Developarelationshipmatrixbetween WHATs andHows StructuringanLShapedDiagram
Easy Notrequireexperience
13
BuildingHouseofQuality
Step3Contd. Relationshipmatrix
Degreeofinfluencebetweeneachtechnicaldescriptorandeachcustomerrequirement
Strongrelationship=9Mediumrelationship=3Weakrelationship=1BlankNorelationship
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BuildingaHouseofQuality
DevelopanInterrelationshipMatrixBetweenHOWs
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Alu
min
um
Wel
ding
Die
Cas
ting
Sand
cas
ting
Strong positive+9
+3 Positive
-3 X Negative
-9 Strong Negative
Step 4
Used to:
identify any interrelationship between each of the technical descriptors (support or conflict?)
Material Selection
Manufacturing Process
Technical descriptors (HOWs)
BuildingaHouseofQualityCompetitiveAssessments
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Step 5
Customer assessment1. Corresponding to each customer requirement
2. Rating from 1 (worst) to 5 (best)
3. Used to
a) determine if the customers requirements have been met.
b) identify areas to concentrate on in the next design
c) Where an organization stands relative to its major competitors
Technical assessment1. Corresponding to each technical descriptor
2. Rating from 1 (worst) to 5 (best)
3. Used to uncover gaps in engineering judgment.
BuildingaHouseofQualityDevelopPrioritizedCustomerRequirements
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Step 6
1. Importance to the customer: rating from 1 (least important) to
10 (very important)
2. Target value: rating from 1 (worst) to 5 (best)
3. Scale-up factor: ratio of the target value to the product rating given in the customer competitive assessment
4. Sales point: 1.0 (lowest) - 2.0 (highest)
5. Absolute weight = 1 X 3X 4
A percent and rank for each customer requirement can be determined.
Houseofquality QFDlayout
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Intercorrelations
Application
Universities Designcoursecontent&curriculum Supportservices
BusinessandDefenseOrganizations Budgeting
Designingtrainingmodules
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Conclusion
QFD Effectivemanagementtool Customerexpectationsareusedtodrivedesignprocessortodriveimprovementinserviceindustries
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Q&A 2012 INSTITUTE OF TECHNOLOGY PETRONAS SDN BHDAll rights reserved. No part of this document may be reproduced, stored in a retrieval system or transmitted in any form or by any means (electronic,mechanical, photocopying, recording or otherwise) without the permission of the copyright owner.