design for quality mpd 575 design for quality developed by: sam abihana ion furtuna adithya...
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MPD 575 DESIGN FOR QUALITYDESIGN FOR QUALITY
Developed By:Sam AbihanaSam AbihanaIon FurtunaIon Furtuna
Adithya RajagopalAdithya Rajagopal
INTRODUCTIONINTRODUCTION
DefinitionDefinition of Quality of Quality What is What is DFQDFQ How DFQ fits into the Ford How DFQ fits into the Ford
PD processPD process DFQ Process FlowDFQ Process Flow Example of DFQ Applied to the Seat Example of DFQ Applied to the Seat
SystemSystem
DEFINITION OF QUALITYDEFINITION OF QUALITY
The Customer defines Quality The Customer defines Quality Our customers want Our customers want products and services that throughout their lives meet their products and services that throughout their lives meet their needs and expectations at a cost that represents value – Ford needs and expectations at a cost that represents value – Ford Quality PolicyQuality Policy
Fitness for use (Fitness is defined by the customer) – J.M. Juran Fitness for use (Fitness is defined by the customer) – J.M. Juran
The totality of characteristics of an entity that bear on its The totality of characteristics of an entity that bear on its ability to satisfy stated and implied needs – ISO 8402ability to satisfy stated and implied needs – ISO 8402
The loss a product imposes on society after it is shipped – The loss a product imposes on society after it is shipped – TaguchiTaguchi
A subjective term for which each person has his or her own A subjective term for which each person has his or her own definition – American Society for Qualitydefinition – American Society for Quality
DESIGN FOR QUALITY (DFQ)DESIGN FOR QUALITY (DFQ)
Quality is intrinsic to a design and is dependent on:Quality is intrinsic to a design and is dependent on: Choice of system architectureChoice of system architecture Robustness of execution during the PD processRobustness of execution during the PD process
Quality is primarily associated with two aspects i.e. Quality is primarily associated with two aspects i.e. functional performance and customer perceptionfunctional performance and customer perception
DFQ is the disciplined application of engineering tools and DFQ is the disciplined application of engineering tools and concepts with the goal of achieving robust design concepts with the goal of achieving robust design development and definition in the PD processdevelopment and definition in the PD process
The DFQ process allows the engineer to: identify, plan-for The DFQ process allows the engineer to: identify, plan-for and manage factors that impact system robustness and and manage factors that impact system robustness and reliability upfront in the design processreliability upfront in the design process
DESIGN FOR QUALITY (DFQ)DESIGN FOR QUALITY (DFQ)
Common product design tools associated with Common product design tools associated with DFQ, and discussed in this presentation, are:DFQ, and discussed in this presentation, are: Boundary DiagramsBoundary Diagrams Interface MatrixInterface Matrix Parameter Diagram (P-Diagram)Parameter Diagram (P-Diagram) Design Failure Mode and Effects Analysis (DFMEA)Design Failure Mode and Effects Analysis (DFMEA) Reliability Checklist (RCL)Reliability Checklist (RCL) Reliability Demonstration Matrix (RDM)Reliability Demonstration Matrix (RDM) Design Verification Plan (DVP)Design Verification Plan (DVP)
The engineering concepts associated with the tools The engineering concepts associated with the tools identified above are based on proven methods identified above are based on proven methods which can be applied across a variety of industrieswhich can be applied across a variety of industries
DFQ IN THE FORD PD PROCESS DFQ IN THE FORD PD PROCESS (GPDS)(GPDS)
UN V0UN V0 UN V1UN V1 UN V2UN V2 M1DJM1DJ
PHASES IN UNDERBODY DEVELOPMENTPHASES IN UNDERBODY DEVELOPMENT
UP V0UP V0 UP V1UP V1 UP V2UP V2 FDJFDJ
PHASES IN UPPERBODY PHASES IN UPPERBODY DEVELOPMENTDEVELOPMENT
UN V0/UP V0: Boundary Diagram/Interface Analysis/P-Diagram/DFMEA/RDM/RCL UN V0/UP V0: Boundary Diagram/Interface Analysis/P-Diagram/DFMEA/RDM/RCL initiated. Quality History review and documentation completedinitiated. Quality History review and documentation completed
UN V1/UP V1: Boundary Diagram/Interface Analysis/P-Diagram/DFMEA/RDM/RCL UN V1/UP V1: Boundary Diagram/Interface Analysis/P-Diagram/DFMEA/RDM/RCL updatedupdated
UN V2/UP V2: Disciplines completed, DFMEA updated with recommend actionsUN V2/UP V2: Disciplines completed, DFMEA updated with recommend actions
M1DJ: Under Body Engineering Freeze/SignoffM1DJ: Under Body Engineering Freeze/Signoff
FDJ: Upper Body Engineering Freeze/Signoff FDJ: Upper Body Engineering Freeze/Signoff
DFQ PROCESS FLOWDFQ PROCESS FLOW
PFMEA CONTROL PLAN
PROCESS DESIGN
BOUNDARY DIAGRAM
INTERFACE MATRIX
P-DIAGRAM
DFMEARELIABILITY CHECKLIST
ROBUSTNESS DEMONSTRATION
MATRIXDVP
PRODUCT DESIGN
BOUNDARY DIAGRAMBOUNDARY DIAGRAM
What?What? Defines the scope of the system being studiedDefines the scope of the system being studied Identifies components that are internal to the Identifies components that are internal to the
systemsystem Identifies system-system, system-human and Identifies system-system, system-human and
system-environment interfaces (External system-environment interfaces (External Components)Components)
Defines the scope of the DFMEA i.e. elements Defines the scope of the DFMEA i.e. elements within the boundarywithin the boundary
Indicates the nature of all interface relationshipsIndicates the nature of all interface relationships Represents all of the above in a clear graphical Represents all of the above in a clear graphical
mannermanner
BOUNDARY DIAGRAMBOUNDARY DIAGRAM
Why?Why? Provide a disciplined approach to ensuring all Provide a disciplined approach to ensuring all
system interfaces are considered at design system interfaces are considered at design initiationinitiation
Understand the nature of interface relationships Understand the nature of interface relationships i.e. i.e. Physically touching (P)Physically touching (P) Energy transfer (E)Energy transfer (E) Information transfer (I)Information transfer (I) Material exchange (M)Material exchange (M)
Communication tool which facilitates team Communication tool which facilitates team understanding and collaborationunderstanding and collaboration
BOUNDARY DIAGRAMBOUNDARY DIAGRAM
How?How? Identify components within the system as blocksIdentify components within the system as blocks Establish relationships between the various blocksEstablish relationships between the various blocks Establish relationships between system components Establish relationships between system components
and other systems, including customer inputand other systems, including customer input Construct a boundary line around what is best Construct a boundary line around what is best
included within the analysis of the systemincluded within the analysis of the system Boundary diagram analysis should follow system Boundary diagram analysis should follow system
hierarchy down to the desired sub-system, hierarchy down to the desired sub-system, component levelcomponent level
P.8+E
P.2.1+E
OCCUPANT
Wiring Harness(Vehicle)
Head Restraint Assembly
ReclinersSeat Buckle
Asy
TrackAsy
Seat Cushion Asy
Door TrimPanel
P.2.2+E
Floor Pan
P.2.1+EP.4+E
Seat Back Cushion Asy
P.6+E
Cushion Pan Asy
Back Frame Asy
Lumbar Asy
P.4+E
P.8
P.5+E
P.4+E
P.5+E
P.5+E
P.5+E
SEAT SYSTEM BOUNDARY SEAT SYSTEM BOUNDARY DIAGRAMDIAGRAM
P.2.1+E
P.8+E
Relative Motion Sub Assembly
Clearance Boundary of Analysis
No Motion Internal Component
Occupant Interaction
Directed or External Component
P Physically touching P.3 Sewing P.8 Interfacing not joined
P.1 Adhesive P.4 Rotational E Energy Transfer
P.2.1 Fastener - Bolt P.5 Snap Fit I Information exchange
P.2.2 Fastener - Screw P.6 Weld M Material exchange
P.2.3 Fastener - Rivet P.7 Crimp (Hog ring, …)
BOUNDARY DIAGRAM LEGENDBOUNDARY DIAGRAM LEGEND
INTERFACE MATRIXINTERFACE MATRIX
What?What? Provides a supplemental analysis of the boundary diagramProvides a supplemental analysis of the boundary diagram Quantifies the strength of system interactions Quantifies the strength of system interactions Provides input to the Potential Effects of Failure and Provides input to the Potential Effects of Failure and
Severity column of the DFMEASeverity column of the DFMEA Robustness linkage to the P-DiagramRobustness linkage to the P-Diagram
Positive interactions may be captured on the P-Diagram as Positive interactions may be captured on the P-Diagram as input signals or output functionsinput signals or output functions
Negative interactions may be captured on the P-Diagram as Negative interactions may be captured on the P-Diagram as input noise or error statesinput noise or error states
Why?Why? Cross-check boundary diagram interfacesCross-check boundary diagram interfaces Verify positive interactionsVerify positive interactions Manage negative interactions for robustnessManage negative interactions for robustness
INTERFACE MATRIXINTERFACE MATRIX
How?How? List all elements within the boundary diagram and all List all elements within the boundary diagram and all
elements that interface across the boundary in the left elements that interface across the boundary in the left most column of the Interface Matrix sheetmost column of the Interface Matrix sheet
Fill the 4 quadrants (Q1-Q4) representing the interface Fill the 4 quadrants (Q1-Q4) representing the interface relationship (P, E, M, I) between the elements of the relationship (P, E, M, I) between the elements of the Boundary Diagram with a rating from -2 to +2Boundary Diagram with a rating from -2 to +2
22 = Necessary for function= Necessary for function 11 = Beneficial but not absolutely necessary for function= Beneficial but not absolutely necessary for function 00 = Does not affect functionality= Does not affect functionality-1-1 = Causes negative effects but does not affect = Causes negative effects but does not affect
functionalityfunctionality-2-2 = Must be prevented to achieve functionality= Must be prevented to achieve functionality
WARNING!!!! Do not enter values into the grayed out area. Only enter areas into the white area. When values are entered into the white area, the corresponding gray side will automatically be entered.
0 0 0 0 0 0 2 2 0 2 2 2 2 2 0 0 0 0 0 0 -1 2 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 -2 0 0 0 -2 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2 2 -2 0 0 0 0 0 0 0 -1 0 0 0 2 2 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 2 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 02 2 -2 0 0 0 0 0 -1 0 0 0 0 0 0 0 2 2 0 0 0 0 -1 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 02 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 2 2 2 2 0 0 0 0 2 2 2 2 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 0 0 2 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 2 2 2 2 0 0 0 0 0 0 0 0 2 2 2 2 2 2 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 -1 2 0 0 0 0 2 2 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
LUMBAR ASY
CSHN PAN ASY
BACK FRAME ASY
TRACK ASY
SEAT BUCKLE ASY
SEAT CSHN ASY
RECLINERS
SEAT BACK CSHN ASY
HEAD RESTRAINT ASY
OCCUPANT
DOOR TRIM PNL
FLOOR PAN
WIRING HARNESS
BA
CK
FR
AM
E A
SY
TR
AC
K A
SY
SE
AT
BU
CK
LE
AS
Y
LU
MB
AR
AS
Y
SE
AT
BA
CK
CS
HN
AS
Y
RE
CL
INE
RS
HE
AD
RE
ST
RA
INT
AS
Y
CS
HN
PA
N A
SY
SE
AT
CS
HN
AS
Y
DO
OR
TR
IM P
NL
OC
CU
PA
NT
FL
OO
R P
AN
WIR
ING
HA
RN
ES
S
PP EEII MM
P-DIAGRAMP-DIAGRAM
What?What? A graphical tool to identify the operating A graphical tool to identify the operating
environment in robustness focused environment in robustness focused analysisanalysis
Provides a structured method to identify:Provides a structured method to identify: Intended Inputs (Signals)Intended Inputs (Signals) Intended Outputs (Ideal Function)Intended Outputs (Ideal Function) Unintended Inputs (Noise Factors)Unintended Inputs (Noise Factors) Unintended Outputs (Error States)Unintended Outputs (Error States) Design Controllable Factors Design Controllable Factors
P-DIAGRAMP-DIAGRAM
What?What?Noise factors are classified as:Noise factors are classified as: Demand related noise which are external to the Demand related noise which are external to the
designdesign Piece-to-Piece Variation (N1)Piece-to-Piece Variation (N1) Changes Over Time (N2)Changes Over Time (N2)
Capacity related noises which are internal to the Capacity related noises which are internal to the designdesign Customer Usage (N3)Customer Usage (N3) External Environment (N4)External Environment (N4) System Interactions (N5)System Interactions (N5)
P-DIAGRAMP-DIAGRAM
Why?Why? Brainstorming tool that supports Brainstorming tool that supports
downstream noise factor downstream noise factor management strategies (RCL) and management strategies (RCL) and verification methods (RDM/DV)verification methods (RDM/DV)
Links to the Function, Potential Links to the Function, Potential Failure Mode and Potential Effect of Failure Mode and Potential Effect of Failure columns of the DFMEAFailure columns of the DFMEA
P-DIAGRAMP-DIAGRAM
How?How? P-Diagrams should support the scope of the system defined in P-Diagrams should support the scope of the system defined in
the Boundary Diagramthe Boundary Diagram
Input & Output Signals: Identified in terms of physics as Input & Output Signals: Identified in terms of physics as positive interactions in the Interface Matrixpositive interactions in the Interface Matrix
Noise Factors (N1-N5) & Error States: Identified in terms of Noise Factors (N1-N5) & Error States: Identified in terms of physics as negative interactions in the Interface Matrix. physics as negative interactions in the Interface Matrix. Brainstorming should be applied to supplement identification Brainstorming should be applied to supplement identification of Noise Factorsof Noise Factors
Error States: Undesired function. Quality History should be Error States: Undesired function. Quality History should be used to supplement identification of error statesused to supplement identification of error states
Control Factors: List of design factors that can be controlled in Control Factors: List of design factors that can be controlled in design i.e. materials, dimensions, location etc.design i.e. materials, dimensions, location etc.
SEAT SYSTEM P-DIAGRAMSEAT SYSTEM P-DIAGRAM
N5System
Interaction
N2Change over Time
N3Customer Usage
N4External Environment
a) Nominal density and ILD of foam (330N, 50 kg/m3)
b)Seat design width (mm)
N1Piece to Piece
a) Variation in foam ILD (+/- 15% N)b) Seath width (+/- mm)
a) Occupant weight (lbs)
Error States
Control Factors
a) Sag >25mm after speified cycles
DR TRIM PANEL - CUSH ASYb) Toleranced seat width exceeds packaging zone reqmts (mm)
a) Driver cushion must pass 200,000 jounce cycles perpendicular to the cushion at 90cpm with sag <25mm
b) Seat width must be within the packagaing zones (mm)
Input SignalIdeal Function OutputNoise Factors
1st Row Seat Asy
OCCUPANT - CUSH ASYa) Occupant jounce load of 50th percentile male butt form loaded to 200 lbs
b) Seat wideline packaging zone (Y-Plane coordinates)
DFMEADFMEA
What?What? A tool which supports activities that A tool which supports activities that
recognize and evaluate potential recognize and evaluate potential failure modes of a product and its failure modes of a product and its effectseffects
Identifies actions which could reduce Identifies actions which could reduce or eliminate the chances of the failure or eliminate the chances of the failure occurringoccurring
Documents the analysis processDocuments the analysis process
DFMEADFMEA
Why?Why? Improve the quality of product evaluation Improve the quality of product evaluation
by applying a standardized method by applying a standardized method Determine how failure modes will be Determine how failure modes will be
avoided in designavoided in design Allows the engineer to recognize high Allows the engineer to recognize high
priority/high impact failure modes and priority/high impact failure modes and prevent them from occurringprevent them from occurring
Improve the robustness of the DVP and Improve the robustness of the DVP and process control plansprocess control plans
P-P-DiDiagagraramm
LinkageLinkage
BoundaryBoundary
DiagramDiagram
LinkageLinkage
InterfaceInterface
MatrixMatrix
LinkageLinkage
DFMEA: ROBUSTNESS LINKAGESDFMEA: ROBUSTNESS LINKAGES
DFMEA: HOW?DFMEA: HOW?
77 55 44
SEAT CUSHIONSupport 200Kjounce cycles(90cpm) of 50thpercentile malebutt formloaded to 200lbswith seat sag <25mm
Seat sag >25mm Poor appearanceCustomer discomfort
55 Inadequate foamdensity and ILD
33 D: DV Jounce Testing
22 3030
SEAT SYSTEM: DFMEASEAT SYSTEM: DFMEA
ROBUSTNESS CHECKLIST (RCL)ROBUSTNESS CHECKLIST (RCL)
What?What? Captures noise factors and error states Captures noise factors and error states
identified in the P-Diagramidentified in the P-Diagram
Identifies areas that require design based Identifies areas that require design based noise factor management strategies noise factor management strategies
Indicates verification methods which Indicates verification methods which provide the ability to test for the error provide the ability to test for the error states associated with the noise factorsstates associated with the noise factors
ROBUSTNESS CHECKLIST (RCL)ROBUSTNESS CHECKLIST (RCL)
Why?Why? Initiate team discussion regarding noise factor Initiate team discussion regarding noise factor
management strategy (NFMS) and robust management strategy (NFMS) and robust verificationverification
Focus on noise factors which have the highest Focus on noise factors which have the highest impact on system robustnessimpact on system robustness
Understand the correlation between the error states Understand the correlation between the error states and associated noise factorsand associated noise factors
Assist robust verification by identifying noise factors Assist robust verification by identifying noise factors which are currently not captured by existing DVM’swhich are currently not captured by existing DVM’s
ROBUSTNESS CHECKLIST (RCL)ROBUSTNESS CHECKLIST (RCL)
HIG
H IM
PA
CT
ER
RO
R S
TA
TE
S
VM TYPE
I I I
H H H
G G G
F F Cat Strategy F
E E I Change Technology E
D D II Apply Parameter Design D C C III Upgrade Design Spec. C B B IV Reduce / Remove Noise B
A A V Add Compensation Device A
VI Disguise / Divert HIGH IMPACT
A B C D E F G H I NFMS Descriptions
NOISE 1: Piece to Piece Variation
NOISE 2: Change Over Time
NOISE 3: Customer Usage
NOISE 4: External Environment
NOISE 5: System Interaction
VERIFICATION METHODSIDEAL FUNCTIONS
10 years and/or 150,000 miles [3600 life cyles]
ERROR STATES
Metric Range
MANAGEMENT STRATEGY (NFMS)
NOISE FACTOR
USEFUL LIFE PERIOD
B - BogeyD - DegradationF - Failure
VM Types
Strong =Weak =None = |
Interaction/Test Method
RCL: HOW?RCL: HOW?Step 1: Choose ideal functionsStep 1: Choose ideal functions
Step 2: Choose focused error statesStep 2: Choose focused error states
Step 3: List associated noise factorsStep 3: List associated noise factors
Step 4: DefineStep 4: Define
metric and metric and
range forrange for
each noise each noise
factorfactor
Step 5: Assess strength Step 5: Assess strength
of correlationof correlation
between error state between error state
and noise factorand noise factor
Step 6: Define NFMSStep 6: Define NFMS
Step 7: List Step 7: List
applicable applicable
DVM’sDVM’s
Step 8: Use an X Step 8: Use an X
to show to show
error states error states
identified identified
by DVM. Identifyby DVM. Identify
High Impact DVM’sHigh Impact DVM’s
Step 9: Use an X Step 9: Use an X
to show to show
noise factors noise factors
included in theincluded in the
DVMDVM
SEAT SYSTEM: RCLSEAT SYSTEM: RCL
1 2 3 4 5
HIG
H IM
PA
CT
ER
RO
R S
TA
TE
S
B D VM TYPE
I I I
H H H
G G G
F F Cat Strategy F
E E I Change Technology E
D D II Apply Parameter Design D C C III Upgrade Design Spec. C B B IV Reduce / Remove Noise B
A Sag >25mm within 200K jounce cycles A V Add Compensation Device A X XVI Disguise / Divert HIGH X IMPACT
A B C D E F G H I NFMS Descriptions
NOISE 1: Piece to Piece Variation
IIINOISE 2: Change Over Time
NOISE 3: Customer UsageIII X
NOISE 4: External Environment
NOISE 5: System Interaction
I
Must complete 200K (90 cpm) jounce cycles of 50% male butt form loaded to 200lbs with sag <25mm
Sea
t S
yste
m J
ou
nce
Du
rab
ility
MANAGEMENT STRATEGY (NFMS)
Increase foam density
10 years and/or 150,000 miles [3600 life cyles]
Occupant weight (95th percentile) lbs 150-215 Increase foam ILD (N)
ERROR STATESNOISE FACTOR
Dri
ve D
ura
bili
ty
Metric Range
Variation in foam density kg/m3 45-55
VERIFICATION METHODSIDEAL FUNCTIONS
USEFUL LIFE PERIOD
B - BogeyD - DegradationF - Failure
VM Types
Strong =Weak =None = |
Interaction/Test Method
RDM/DVPRDM/DVP
What?What? Planning tool that documents:Planning tool that documents:
Design Verification Methods (DVM) Design Verification Methods (DVM) Level TestedLevel Tested Acceptance CriteriaAcceptance Criteria Test Timing Test Timing
RDM is a subset of the DVP that additionally RDM is a subset of the DVP that additionally documents:documents: Failure Mode (Hard or Soft)Failure Mode (Hard or Soft) DVM for select tests specified by the RCLDVM for select tests specified by the RCL Noise Factors being tested Noise Factors being tested Robustness targets in relation to customer expected Robustness targets in relation to customer expected
function. Targets of R/C (R90/C90) are not acceptablefunction. Targets of R/C (R90/C90) are not acceptable
RDM/DVPRDM/DVP
Why?Why? Demonstrates that components/systems fulfill Demonstrates that components/systems fulfill
reliability requirements identified in the RCL reliability requirements identified in the RCL Provides a forum to review the high impact error Provides a forum to review the high impact error
states and noise factors that affect the system states and noise factors that affect the system along with the identified DVM to prove out their along with the identified DVM to prove out their systemsystem
Structured documentation of verification test Structured documentation of verification test plans and timingplans and timing
Provides single point summary of test plansProvides single point summary of test plans
RDM: HOW?RDM: HOW?
VM # VM Description VM Target High Impact Error Description Metric Range Demonstrated Result
Risk (R/YG) Issues Comp. Date
1DVM: Seat Jounce
DurabilitySag <25mm Sag >25mm 1 Variation in foam density kg/m3 45-55
High Impact Noise factors
FROM RCLFROM RCL
DVP: HOW?DVP: HOW?
Date revised:
Program Supplier Product Development Engineer STA EngineerPart Name Part Number Product Development Manager Chief Program Engineer
DesignLevel
Tested Required Tested Sched. Actual Sched. Actual
1 DV 3 3 1/1/2007Seat Cushion: Jounce the seat at 90 cycles per minute + /- 10%, perpendicular tothe CP of the seating surface with a 50% male size butt form loaded to 900 N (200 lb) as defined in DVM-0036-ST v9. Cushion samples to be
tested at 45 and 55 kg/m3
densities per RDM.
Sag <25mm after completion of 200K jounce cycles on 3 consecutive samples
DESIGN VERIFICATION PLAN
Item #
Test Name/Source RemarksAcceptance CriteriaTest Results
(incl. Pass/Fail) (Ref. Test Report #)
Sample Size Start TimingCompletion
Timing
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