quality tools

Research PapersResearch Papers

Scholar goggleScholar gogglehttp://scholar.google.comhttp://scholar.google.comGood for author or topic searchGood for author or topic searchGeneral based searchGeneral based search

Library OnlineLibrary Onlinehttp://library.queensu.ca/http://library.queensu.ca/CompendexCompendexScholars PortalScholars PortalEE--journalsjournalsOrdering papers Ordering papers -- RacerRacer

http://scholar.google.com/

http://library.queensu.ca/

Ishikawa Ishikawa DiagramsDiagramsFishbone DiagramsFishbone Diagrams

For Quality Projects and For Quality Projects and Disassembly ProjectsDisassembly Projects

The contents of this lecture are the sole copyright of M. Ham.They are intended for use only by students in MECH 424, Life Cycle Engineering,Queen’s University, Kingston, ON, Canada.Unlicensed use of the contents of this lecture outside MECH 424 is illegal.

Ishikawa DiagramIshikawa Diagram

Used as a visual tool to help with Used as a visual tool to help with brainstorming causes for problemsbrainstorming causes for problemsUsed properly can allow a team to Used properly can allow a team to brainstorm hundreds of possible caused in brainstorm hundreds of possible caused in a short period of timea short period of timeHelps visual learners see the problem and Helps visual learners see the problem and causescausesIn 6In 6σσ used before used before FMEAsFMEAs


Fishbone diagram Fishbone diagram -- shapeshapeCause & Effect Cause & Effect –– relationshiprelationship

Problem Statement

or Effect

Cause

Cause

CauseCause

Cause Cause

Root Cause

StructureStructure

Main Bones Main Bones ––Man/Machine/Method/Material/Measurement/Man/Machine/Method/Material/Measurement/MilleuMilleu

Generates many ideas without biasing opinionGenerates many ideas without biasing opinionGenerates LARGE number of causesGenerates LARGE number of causes

People/Polices/Procedures/PracticesPeople/Polices/Procedures/PracticesIdentify Possible Cause & ClusterIdentify Possible Cause & Cluster

ReRe--do the brainstorming of causesdo the brainstorming of causesCan bias the resultsCan bias the resultsGenerates less causesGenerates less causes

ExampleExample

ApplicationsApplications

Roll DamageRoll DamageReduce startReduce start--up & up & change over time & change over time & wastewaste

http://www.adp-gmbh.ch/personal/pindo_deli/

http://www.kohliindustries.com/rotogravure1.htm

http://www.meadwestvaco.com/coatedboard.nsf

Reverse FishboneReverse Fishbone

Commonly used in Commonly used in disassembly analysisdisassembly analysis


Same Fishbone shapeSame Fishbone shapeProduct and subassemblies to partsProduct and subassemblies to parts

Product

Subassembly

Subassembly

SubassemblySubassembly

Subassembly Subassembly

Individual part

ExampleExampleReference: Reference: INTERNATIONAL INTERNATIONAL

CONFERENCE ON CONFERENCE ON ENGINEERING ENGINEERING DESIGN, ICED 03 DESIGN, ICED 03 STOCKHOLM, STOCKHOLM, AUGUST 19AUGUST 19--21, 200321, 2003

“DESIGN EVALUATION “DESIGN EVALUATION METHOD FOR THE METHOD FOR THE DISASSEMBLY OF DISASSEMBLY OF ELECTRONIC ELECTRONIC EQUIPMENT”EQUIPMENT”

Matthew I. Campbell, Matthew I. Campbell, AsadAsad HasanHasan

A Quality Tool

Poke YokesPoke Yokes

Taken from:Taken from:Life Cycle EngineeringLife Cycle Engineering

MECH 424MECH 424

The contents of this lecture are the sole copyright of M. Ham.They are intended for use only by students in MECH 424, Life Cycle Engineering,Queen’s University, Kingston, ON, Canada.Unlicensed use of the contents of this lecture outside MECH 424 is illegal.

Poke YokePoke YokePoke Yoke is Japanese for Mistake ProofingPoke Yoke is Japanese for Mistake Proofing

Idiot proofIdiot proofEngineering controlEngineering controlError ProofingError ProofingFail SafeFail Safe

Device prevents a mistake from occurring or Device prevents a mistake from occurring or detects the mistake and makes is obvious detects the mistake and makes is obvious immediatelyimmediately

Examples of Poke YokeExamples of Poke Yoke

http://www.campbell.berry.edu/faculty/jgrout/pokayoke.shtml


SolutionSolutionElimination: Redesign the system to eliminate the Elimination: Redesign the system to eliminate the

chance of the error. chance of the error.

Facilitation: Provide methods of guidance to Facilitation: Provide methods of guidance to minimize the chance of an error. minimize the chance of an error.

Mitigation: Lessen the effect of the error if the Mitigation: Lessen the effect of the error if the resulting defect gets to the customer. resulting defect gets to the customer.

Flagging: Proven methods for insuring 100% Flagging: Proven methods for insuring 100% chance of capturing and removing all defective chance of capturing and removing all defective units prior to shipment. units prior to shipment.

Reference:http://main.isixsigma.com/forum/showmessage.asp?messageID=2667

Examples of Poke YokeExamples of Poke Yoke


Eliminate

EliminateEliminate/Facilitate

Facilitate

Facilitate

Mitigate


Poke Yoke ApplicationsPoke Yoke ApplicationsLoading of Parts to Loading of Parts to Run MachineRun MachinePart Location Part Location Seat Belt BracketSeat Belt BracketTorque Guns Torque Guns ––applied until correctapplied until correctWindshield Windshield InstallationInstallationTailgate Wedge Tailgate Wedge Door Wedge nutDoor Wedge nut

References: www.fotosearch.com, www.detnews.com/2004/project/0405/04/901-134795.htm, www.ford.com

More ApplicationsMore Applications

Reference: http://www.perceptron.com

Poke Yoke – car held until verified by Quality Tech or Eng. – able to set accept/reject limits

So What? So What?

How does this fit it in with MECH 424?How does this fit it in with MECH 424?

How does this fit into Engineering?How does this fit into Engineering?

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