Post on 03-Feb-2020
© 2009 Ops A La Carte 1
Mike Silverman // (408) 654-0499 // mikes@opsalacarte.com
Ops A La Carte LLC // www.opsalacarte.com
Reliability & Robust Design in the Medical Industry
for
"Meet the Experts" Design Forum Event
© 2009 Ops A La Carte 2
Presenter’s Biographical Sketch – Mike Silverman
◈Mike Silverman is founder and managing partner at Ops A La Carte, a ProfessionalConsulting Company that has in intense focus on helping customers with end-to-endreliability. Through Ops A La Carte, Mike has had extensive experience as a consultantto high-tech companies, and has consulted for over 100 different industries, including thefood industry.
◈Mike has 28 years of reliability and quality experience. He is also an expert inaccelerated reliability techniques, including HALT&HASS (and recently purchased a HALTLab), testing over 500 products for 100 companies in 40 different industries.
◈Mike just completed his first book on Reliability called “50 Ways to Improve Your ProductReliability”. This course is largely based on the book material.
◈Mike has authored and published 8 papers on reliability techniques and has presentedthese around the world including China, Germany, Canada, Taiwan, India, Singapore,and Korea. Ops has also developed and currently teaches 31 courses on reliabilitytechniques.
◈Mike has a BS degree in Electrical and Computer Engineering from the University ofColorado at Boulder, and is both a Certified Reliability Engineer and a course instructorthrough the American Society for Quality (ASQ), IEEE, Effective Training Associates, andHobbs Engineering. Mike is a member of ASQ, IEEE, SME, ASME, PATCA, and IEEEConsulting Society and is the current chapter president in the IEEE Reliability Society forSilicon Valley.
© 2009 Ops A La Carte3
Seminar OverviewWed, Nov 14, 2012
- DFR OVERVIEW -
Introduction
Difference between Quality and Reliability
Difference between Regulatory and Reliability
Design for Reliability Overview
Developing an Effective Reliability Test Plan
COMPANY OVERVIEW
Confidence in Reliability
Ops A La Carte– Founded in 2001– Named top 10 fastest growing private companies
in the Silicon Valley in 2006 and 2009.– Over 1500 projects completed in 11 years– Over 500 Customers in over 30 countries– Over 100 different industries, 7 main verticals
• CleanTech, Consumer Electronics, Defense, • Industrial, MedTech, Oil/Gas, Telecom
– In 2012, we launched our new Ounce of Prevention Strategy (OPS) Program
Introduction
OPS in N.America
Our Consultants
OPS Around the World
Singapore
Our Consultants
PST
LED Street Lighting
• Ops Medical Projects• 3M Health Care - Reliability Plan and data analysis for drug
delivery systems and devices• Abbott - ALT for glucose monitoring system• Accuray - Reliability Assessment and program plan for
stereotactic radiosurgery device for tumors • Applied Biosystems - HALT and RoHS services for DNA
sequencing products. • Boston Scientific - HALT, V&V, and CRE/CQE Training for
minimally invasive medical devices • Cardiac Assist - HALT for cardiac surgery device• Cardinal Health - ALT for neonatal CPAP device, root cause
analysis for nebulizer• Carestream - DfR Training for mammography solutions company• Cochlear - ALT Training for implantable hearing aids• Covidien - Reliability plan and predictions for drug delivery systems• Fisher and Paykel Healthcare - ALT for sleep apnea device• Flextronics Medical - Software reliability for medical systems• Hospira - Complete reliability program for infusion pumps
• Ops Medical Projects, continued• Intuitive Surgical - HALT, V&V, Reliability Improvement Plan, &
Vendor Quality for medical robotics• Lifescan/Johnson+Johnson - HALT for glucose monitoring
system• Luminetx - ALT for vein finding system• Mako Surgical - Reliability plan for robotic knee surgery system• Next Safety - Reliability prediction for pulmonary drug delivery
devices• OmniCell - HALT and ALT for medical dispensing systems• Ortho-Clinical/Johnson+Johnson - HALT for transfusion
medicine • Perfint Healthcare Devices - Reliability test plan for image
guided procedure system• Perkin-Elmer - HALT and HASS for medical illumination system• Philips Medical - Cable qualification testing for sonogram
system• Proteus Biomedical Inc. - HALT and environmental testing for
in-body computing (implantable)
• Ops Medical Projects, continued• Pulmonetic - HALT for ventilator system• Philips Medical (formerly Respironics) - Reliability plan, HALT,
ALT, and teardown analysis for sleep apnea device• Siemens Medical (formerly Acuson) - Reliability prediction for
nuclear medicine system• Solta Medical (formerly Thermage) - HALT for radiofrequency
cosmetic procedure systems• Stryker - HALT for medical illumination system• Suni Medical - Quality system review for dental medical imaging
systems• Tecan Systems - HALT and root cause analysis for laboratory
instrument• Terumo Medical (formerly Mission Medical) - Reliability plan,
FMEA, HALT, and ALT for blood collection system• Thoratec - HALT and ALT for heart pump devices• Ventana Medical – HALT and environmental testing for
automated immunohistochemistry (IHC) system• World Heart - HALT for pulsatile ventricular device
11© 2009 Ops A La Carte
FREE Webinars for 2012• Nov 7 – 40 Years of HALT (500 people)• Dec 5 – Counterfeiting• Jan 9 - Accelerated Life Testing
Details for all are on our site at www.opsalacarte.com
Upcoming Events• Dec 4-5: BIOMEDevice Show - December 4-5, 2012• Jan, 2013 – RAMS• Feb, 2013 – MD&M West – Anaheim – Medical Testing
Details for all are on our site at www.opsalacarte.com
12© 2009 Ops A La Carte
Ops’ New Reliability BookHow Reliable Is Your Product?
50 Ways to Improve Product Reliability
A new book by Ops A La Carte LLC® Founder/Managing Partner Mike Silverman
The book focuses on Mike’s experiences working with over 500 companies in his 25 year career as an engineer, manager, and consultant. It is a practical guide to reliability written for everyone in your organization. In the book we give tips and case studies rather than a textbook full of formulas. Available January 2011 in hardback for $44.95 or ebook for $19.95 @amazon.com or http://www.happyabout.com/productreliability.php For more info, go to www.opsalacarte.com
• Ops Solutions – Ops provides end-to-end solutions that target the corporate product reliability objectives • Ops Individual “A La Carte” Consulting – Ops identifies and solves the missing key ingredients needed for a fully integrated reliable product• Ops Training – Ops’ highly specialized leaders and experts in the industry train others in both standard and customized training seminars• Ops Testing – Ops’ state-of-the-artprovides comprehensive testing services
orOunce of
Prevention Strategy
In today's world of product development, product cycles are shortening, product complexity is accelerating, and companies are relying more on outside resources.
Ounce of Prevention Strategy (OPS)
What do Computer Laptop Battery fires, Toyota Prius crashes, BP Oil Rig explosionhave in common?
They all did not use our Ounce of Prevention Strategy (OPS). Our OPS methodology, if used, will discover problems BEFORE your customers find them.
Consulting Services
GoalSetting
Assess-ment
Bench-mark
FTAFMEA
GoldenNuggets
Component Selection
Predict-ions
ThermalAnalysis
DeratingAnalysis
POF
DOE Tolerance Analysis
Preventive Mainten.
EOL Analysis
WarrantyAnalysis
TestPlan
HALT RDT ALT HALT-AFR Calculator
FEA SoftwareReliability
RCA CLCA
VendorAssessmt
HASS ORT OOBA
LessonsLearned
WarrantyReturns
ReliabilityReporting
Statistics EDA forObsolesc
Out-sourcing
Metrics
ReliabilityPlan
PHA
SEPH
ASE
PHA
SEPE
PHA
SE
Gap Analysis
Block Diagrams
© 2009 Ops A La Carte
17
Seminar OverviewWed, Nov 14, 2012
- DFR OVERVIEW -
Introduction
Difference between Quality and Reliability
Difference between Regulatory and Reliability
Design for Reliability Overview
Developing an Effective Reliability Test Plan
Failure Rate
Time
Quality: Does the product work when the customer first receives it / first turns it on?
Reliability: How often does the product fail after the customer receives it / first turns it on?
Reliability: How long does the product work until it wears out?
© 2009 Ops A La Carte
19
Seminar OverviewWed, Nov 14, 2012
- DFR OVERVIEW -
Introduction
Difference between Quality and Reliability
Difference between Regulatory and Reliability
Design for Reliability Overview
Developing an Effective Reliability Test Plan
Similarities and Differences Between Regulatory Programs
and Reliability Programs
Food and Drug Administration FDA http://www.fda.gov/
21 CFR Parts 808, 812, and 820 Medical Devices; Current Good Manufacturing Practice (CGMP) Final Rule; Page 2
SUPPLEMENTARY INFORMATION: I. Background (Design Controls)
“Specifically, in January 1990, FDA published the results of an evaluation of device recalls that occurred from October 1983 through September 1989, in a report entitled ‘‘Device Recalls: A Study of Quality Problems’’.
FDA found that approximately 44 percent of the quality problems that led to voluntary recall actions during this 6-year period were attributed to errors or deficiencies that were designed into particular devices and may have been prevented by adequate design controls.
Government Regulations
We have found that many medical companies confuse reliability with compliance.
Just because you follow the compliance regulations does not guarantee you have a reliable product.
In fact, the new IEC 60601-1 3rd Edition document requires that your testing be based on risks you discover during your risk management process.
In this presentation we will show you two different case studies – one in which we met the basic reliability requirements and a second in which we had a separate reliability effort to address specific reliability risks.
Reliability vs. Compliance
The following case study illustrates how to use
regulatory and reliability together in a program.
CASE STUDY 1: FDA Class III Medical Device Pacemaker
• Submitted and approved documents:• 1) Corporate Quality System Handbook• 2) Product Development Handbook• 3) Product Development Management Plan and Report• 4) Product development, review and approval record• 5) Risk Analysis for both software and hardware• 6) Failure Rate Prediction, parts count• 7) Failure Mode Effects Analysis / Fault Tree Analysis• 8) Product Validation test reports both hardware and software• 9) Document change procedure• 10) Document release procedure• 11) Purchase procedure• 12) Product serial number system• 13) Material Review Board Procedure• 14) Finish Goods Procedure• 15) Internal Audit Procedure• 16) Training Procedure• 17) Standard Operations Procedure
Case Study: FDA Class III Medical DevicePacemaker interrogating device
Pre Market Approval
The next example illustrates how we worked with a company and
took them through an entire reliability program to make sure we addressed all major risks to
reliability.
CASE STUDY 2: Infusion Pump
CASE STUDY II: MEDICAL INFUSION PUMP
The infusion pump was an n+1 design
We started with a reliability goal
statement
Then we wrote a comprehensive
reliability program plan
MEDICAL INFUSION PUMP
• RELIABILITY PROGRAM PLANWhich areas were the sameWhich areas were newReliability allocationsGap analysisReliability Tools Deployed, General for all assembliesReliability Tools Deployed, Specific to certain assysHow will tools be usedMetrics to be used during programReliability Reporting and Issues ManagementRoles and ResponsibilitiesReliability DeliverablesContingency PlanningOngoing Reliability Assurance
MEDICAL INFUSION PUMP
• NEW ASSEMBLIESTwo new motors - one for the cassette insertion
and removal, and one for the air sensor to pinch the tubing in order to detect air bubbles in the line.
A new power supply that was larger and also had a battery charging circuit for the new rechargeable battery.
A touch screen
An IEEE 802.11 wireless interface
A new rechargeable battery design
New software to handle all of these new features
MEDICAL INFUSION PUMP
• IDENTIFY RELIABILITY RISKSUsing the Risk Analysis process, we identified
as many new risks as possible
Then we set out to figure ways of mitigating these risks
Design analysis techniques such as FEA, DOE, and Thermal AnalysisAccelerated Testing techniques such as HALT,
ALT, and RDT
The important element here is that we always had an eye on our goal.
MEDICAL INFUSION PUMP
• RELIABILITY TECHNIQUES USEDMotors – FEA, ALT
Power Supply – HALT then RDT
Touch Screen – ALT, Abuse Testing
Wireless Interface - HALT
Battery – Application Specific ALT
Software – Software FMEA, Software Use Case Testing
MEDICAL INFUSION PUMP
• RESULTSUsing this process we saved time and money.
We found out issues during the design analysis that would have required a redesign had we found them later in the design, or worse, out in the field
We found out issues during the testing that would have set our program back months.
End result: We developed and delivered a very reliable product and got it to market faster.
MEDICAL INFUSION PUMP
© 2009 Ops A La Carte
33
Seminar OverviewWed, Nov 14, 2012
- DFR OVERVIEW -
Introduction
Difference between Quality and Reliability
Difference between Regulatory and Reliability
Design for Reliability Overview
Developing an Effective Reliability Test Plan
© 2008 Ops A La Carte
34
DESIGN FOR RELIABILITY (DFR)
OVERVIEW
Definition
• DfR is knowledge‐based engineering wherein, starting with capture of requirements and leading to assured reliability, a reliability plan is designed and executed using the full skills and knowledge of the project team.
• The goal of DfR is to work smarter through knowledge‐based tailoring of the reliability plan.
11/17/2012 Ops A La Carte © 35
• Making a list of all possible reliability activities and then trying to cover as many as possible within the timeframe of the product development process.
• Assuming that product reliability is the sole responsibility of a reliability engineer (reliability engineer is the guide and mentor but not the owner – designer should be the owner).
• Getting the product into test as fast as possible to test reliability into the product (a.k.a. Test‐Analyze‐and‐Fix)
• Only working on the in‐house design items and not worrying about vendor items
• Working in silos between EE, Mech E, Software, etc. (even if they apply some or most of the DfR tools) – all competencies must work together to reach common goals.
Is NOT
11/17/2012 Ops A La Carte © 36
IS
• Identifying goals and requirements, consistent with customer and business objectives.
• Applying knowledge‐based management and engineering, to define, implement and improve plans to achieve goals and requirements.
• Providing clear metrics for review. Reviewing and taking timely corrective action.
• Reviewing and knowledge‐capture from all activities and outputs, with goal of continuous improvement.
• DfR is the process of building reliability into the design, with efficiency and assurance, using the best science‐based methods.
11/17/2012 Ops A La Carte © 37
Flow
A detailed evaluation of an organization’s approach and processes involved in creating reliable products. The assessment captures the current state and leads to an actionable reliability program plan.
• Initiate a Reliability Program• Determine next best steps• Reduce customer complaints • Select right tools• Improve reliability
Now
Goal
$ unreliability
$ Profits
Assessment Interviews
StatisticalData Analysis
Benchmarking
Gap Analysis
Program Plan
complaints
fieldfailures
satisfaction
marketshare
? Unknown Reliability ?
11/17/2012 Ops A La Carte © 38
Key Activities
1. Concept
2. Feasibility
3. Development4. Qualification
5. Launch
6. Post‐Launch
11/17/2012 Ops A La Carte © 39
DfR Key Activities
QFD, Requirements definitions, Benchmarking, Product usage analysisUnderstanding of customer requirements and specifications
DFMEA, Cost trade‐off analysis,Lessons LearnedProbabilistic design, Cost trade‐offs, Tolerance Analysis
FEA, Warranty Data Analysis, DRBFM, Reliability predictionLessons Learned, Reliability Block Diagrams
HASS, Control Charts, Re‐validation, Audits, Look Across,Lessons Learned, ORT
HALT, Evaluation Testing, DRBTR,Reliability Growth modeling, Change Point Analysis
Design and Process ValidationAccelerated Test. Reliability Demonstration.
1. Concept
2. Feasibility
3. Development4. Qualification
5. Launch
6. Post‐Launch
11/17/2012 Ops A La Carte © 40
Key points for implementing DfRactivities
• Start DfR activities early in the process
• Reliability engineer’s job is to lead/coach the design team. Reliability achievement needs to be owned by design and manufacturing teams.
• Integration of Reliability and Quality Engineers with design teams.
• Warranty/field data analysis (both statistical and root cause analysis) needs to be fed back to both design and reliability teams.
• Reduce the number of tools in the toolbox, but use the remaining well. Neither all steps nor tools are necessary for all the programs.
11/17/2012 Ops A La Carte © 41
42
Reliability Before Design
SpendingRate
Qualification Time
0
1
2
3
4
5
6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Development
Feasibility
Concept
Launch
Post-Launch
Product Development Spend Rate
Reliability Spend Rate
Traditional Reliability Model
43
Reliability Before Design
SpendingRate
Time
0
1
2
3
4
5
6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Qualification
Development
Feasibility
Concept
Launch
Post-Launch
Product Development Spend Rate
New Reliability Spend Rate$ Savings $
Reliability Before Design / Design for Reliability Method
© Ops A La Carte LLC 2012© 2009 Ops A La Carte
44
Seminar OverviewWed, Nov 14, 2012
- DFR OVERVIEW -
Introduction
Difference between Quality and Reliability
Difference between Regulatory and Reliability
Design for Reliability Overview
Developing an Effective Reliability Test Plan
© 2008 Ops A La Carte 45
DEVELOPING AN EFFECTIVE
RELIABILITY TEST STRATEGY
Steps to a Good DesignIn order to write better test plans:1) Understand Requirements2) Understand Use Environment3) Perform FMEA4) Use Robust Design techniques5) Perform Design & Design Reviews6) Write Design Verification Test plan7) Write Reliability Test Plan
Understanding Requirements
Inputs include:–Specifications
• MRD – Marketing Requirements Document• PRD – Product Requirements Document
–Competitive Product Solutions–Lessons Learned–Constraints
Understanding Requirements
• Risks comes From Requirements That Are– Incomplete –Ambiguous –Conflicting–Not Testable
Steps to a Good Design
In order to write better test plans:1) Understand requirements2) Understand use environment
Understand Use Environment
• What are normal use conditions?• What are typical abuse conditions?• What are atypical (but real) abuse conditions?• What is life of product?
Steps to a Good Design
In order to write better test plans:1) Understand requirements2) Understand use environment3) Perform FMEA
Perform FMEAFailure Modes and Effects Analysis (FMEA) is the process by which we explore potential failure modes and then prioritize by key risks
Perform FMEA• Use good brainstorming techniques,
breaking sessions out by different disciplines/areas–User (UFMEA)–Wearout (WFMEA)–Design (DFMEA)–Software (SFMEA)–Process (PFMEA)–Interface (IFMEA)
Steps to a Good Design
In order to write better test plans:1) Understand requirements2) Understand use environment3) Perform FMEA4) Use Robust Design techniques
Use Robust Design TechniquesDesign for Robustness (RD) is a
systematic engineering based methodology that develops and manufactures high reliability products at low cost with reduced delivery cycle.
The goal of RD is to improve R&D productivity and reduce variationwhile maintaining low cost before shipment and minimal loss to society after shipment.
Example of Robust Design: MIR Space Station
• Robustness = survivability in the face of unexpected changes in environment (exo) or within the system (endo)
MDfR-Mechanical Design for Reliability
Example of Optimal Design• M. Alboreto dies (Le Mans, April 2001) due to slight loss
of pressure in left rear tire. The system was extremely sensitive to boundary conditions (was optimal, and therefore very very fragile!).
Steps to a Good Design
In order to write better test plans:1) Understand requirements2) Understand use environment3) Perform FMEA4) Use Robust Design techniques5) Perform design and design reviews
Designing to RequirementsMechanical
• Common Hardware• Minimize Part Count• Feature Integration• Design For Assembly• Design For Test• Design for Service
Designing to RequirementsElectrical
• Select Parts With Long Lifetimes• Design For Assembly• Design For Test
– In-Circuit Test–Functional Test
• Design for Service
Designing to RequirementsSoftware
• Understand reqts before coding• Phase containment approach• Growth through defect tracking
Design Reviews
• Compare plan with reality• How to determine actual
status?–Engineer says he’s 90%
done, but how do you know?–Short schedule milestones
should have broken the project into short measurable pieces
• Do your reviews ever uncover anything?
Steps to a Good Design
In order to write better test plans:1) Understand requirements2) Understand use environment3) Perform FMEA4) Use Robust Design techniques5) Perform design & design reviews6) Write design verification test plan
Develop Design Verification Test
Create tests that match each requirement and can be traced back to ensure you have covered the requirements.
Use trace matrixUse FMEA to record how each failure
mode is covered by which requirement.
Steps to a Good DesignIn order to write better test plans:1) Understand requirements2) Understand use environment3) Perform FMEA4) Use Robust Design techniques5) Perform design & design reviews6) Write design verification test plan7) Write Reliability Test Plan
Write Reliability Test Plan
Write Reliability Test PlanStart with DVT plan and then review FMEA to determine what areas standard tests will not guarantee reliability.1) For Environmental tests, do you
test outside specs/to failure ?2) For Electrical/Mechanical
stresses, do you test outside specs for margin ?
What You Need to Write a Good Test Plan
• Goal• Sample Size• Time• Acceleration• Confidence
What Is Confidence ?
Case Study 1 - InhalerFeatures of
Inhaler• Dose Dial• Cleaning• Change vial• Charge battery• On/Off• Use
Developing a Test Plan with FMEA
• What types of tests can you think of for this device?
Run Exercise
Features of InhalerFEATURE Operator Design Maintenance ManufacturingDose DialCleaningChange vialChargebatteryOn/OffUse
Case Study 2 - Implantable
Features of Implantable• Implant Section
– Provide stimulation to brain– Provides safe seal
• Lead– Makes connection to implant– Provides safe seal
Slide courtesy of Intrapace
Developing a Test Plan with FMEA
• What types of tests can you think of for this device?
Run Exercise
Features of InhalerFEATURE Opera
torDesign Maintenance Manufacturing
Implant- Stimulation- Safe SealLead
- Connectivity- Safe Seal
FMEA Summary
• FMEA helps improve product by mitigating major risks.
• FMEA also prompts design consideration and improvement, to make the design more robust before testing
DFR Summary
• Design for Reliability (DFR) is integrating reliability into each portion of product life cycle.
• Reliability is not just about testing.– You can’t test reliability into a product.
• You Must Design it In!
• Using DFR, you will design reliability and availability into your product to make these more predictable.
Results
Q&A
CONTACT INFO
Mike SilvermanManaging Partner
Ops A La Carte, LLC(408) 654-0499
mikes@opsalacarte.comwww.opsalacarte.com