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- Abuses, Misuses, and In-excuses
- Ten Ways to do the Wrong QC Wrong
- FAQ's about Multirule QC
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- Power Function Graphs of Multirules
- Quality Requirements (CLIA and others)
- 2025 CLIA Acceptance Limits for Proficiency Testing
- Consolidated measurement uncertainty specifications
- Consolidated Comparison of Immunoassay Performance Specifications
- New Goals for MU Goals
- Consolidated Comparison of Chemistry Performance Specifications
- The New Era of Biological Variation: EUBIVAS
- Consolidated Comparison of Hematology and Coagulation Performance Specifications
- French EQA performance specifications
- A selection of SEKK-DMax specifications
- Belgium EQA performance specifications
- Spanish Minimum Consensus Performance Specifications
- Final Milan Hierarchy
- Milan 2014 Consensus Draft on Quality Specifications
- Minimum analytical quality requirements
- Minimum Specifications from Biological Variation database
- Optimal Biological Variation database specifications
- CLIA Requirements for Analytical Quality 1992
- Desirable Biological Variation Database specifications
- Rilibak - German Guidelines for Quality
- Biological Variation in Patients with Disease
- Clinical Quality Requirements
- European Biologic Goals
- Biological Variation Database references
- Biological Variation Database reference list
- 2016 State of the Art Hematology Performance Specifications
- Quality Requirements for Dogs, Cats, and Horses?
- 1999 Stockholm Consensus Statement
- RCPA Allowable Limits of Performance for Biochemistry
- CLIA Final Rule
- Calculating the consequences of Tightened CLIA Goals
- Contemplating the Consequences of New CLIA Goals
- Evaluating the Proposed CLIA TEa Changes
- 2016 IQCP Users Survey (Global)
- An Outside Review of an IQCP for POC
- 2016 IQCP Users Survey Comments
- Example IQCP for POC chemistry system
- Your Risk-Free IQCP Inspection Tips
- Example IQCP for C. Difficile
- IQCP - Does the P stand for Panic?
- New CMS / CDC Training Guide for IQCP
- 2015 IQCP Survey: The View From Outside
- IQCP Survey 2015: Labs Speak Out!
- CMS goes off-off-label
- Part I: Key Changes
- Part II: Perplexity about Complexity and Personnel
- Part III: QC - Quality or Compliance?
- Part IV: The New Method Validation Regulations
- Part V: Method Validation Process and Procedures
- Part VI: Method Validation - Statistical Sense, Sensitivity, and Significance
- Part VII: "Equivalent" QC Procedures
- Part VIII: The Interpretive Guidelines
- Part IX: Appropriate QC Procedures
- Part X: Lies, Damn Lies, and "Equivalent" QC
- A Scientific Rationale for Equivalent QC?
- Analysis of the Rationale for "Equivalent" QC
- "Equivalent" QC Option 4: Back to the future
- Is this the end of EQC 1, 2, 3?
- Basic QC Practices
- The Global QC Survey Results: High vs Low Volume Laboratories
- The 2021 Global QC Survey: The fine print
- The 2021 African QC Survey Results
- 2021 QC Survey Results for Hematology
- The 2021 QC Survey Results for Chemistry
- The 2021 Latin and South American QC Survey
- The 2021 European (and others) QC Survey Results
- The 2021 Asia QC Survey Results
- The 2021 Middle-East QC Survey Results
- The 2021 USA QC Survey Results
- The 2021 Great Global QC Survey Results
- A Downside of Negative Controls for SARS-COV-2 Testing?
- Another look at Pre-Analytical Error Rates, 2021
- Plateau-ing on progress at the pre-analytical phase
- Leading Laboratories Lag Behind in QC Practices
- A look at pre-analytical error rates, 2018
- Great Global QC Survey of Hematology Practices
- A Global Survey of Veterinary Laboratory QC Practices
- Latin and South American QC Survey Results
- Break all the rules, part 3 - answers
- Break all the rules (Part 3)
- Evidence of Improving Pre-Analytical Quality
- The Great Global QC Survey: Results from Global (non-US) Laboratories
- The Great Global QC Survey: Results from US Laboratories
- The 2017 Great Global QC Survey Results
- Break all the Rules! (Part Two)
- Break All the Rules - Answers to Part One
- Break all the Rules! (Part One)
- What changed with this QC?
- Would your lab have caught this error, part 2?
- Would this QC get you fired?
- Has your QC been Vanity-Sized?
- Would your lab have caught this error?
- QC - the Practice
- Six Sigma
- Benefits of Sigma-metrics, Before and After
- Six Sigma across the Total Testing Spectrum
- Six-Sigma - Medical Cutoffs as Tolerance Limits
- Six Sigma - Quality Design and Control Applications
- Six Sigma - Patient Data for Assessing Process Performance and Stability
- Six Sigma - Designing Quality Control for Neonatal Screening Assays
- Six Sigma - A Project in Action
- Quality Standards
- A multisite study of cobas pure finds nearly half of 17 assays cannot meet desirable uncertainty goals
- A majority of DxC 700 assays in an Indian Lab meet uncertainty goals
- 11 of 13 biochemistry methods on the Atellica cannot hit desirable measurement uncertainty goals
- A majority of cc assays on a Vitros 5600 and Vitros 250 in India cannot meet desirable measurement uncertainty goals
- 11 out of 13 Alinity-i and Alinity-c assays fail to meet new measurement uncertainty requirements
- 32 of 37 assays on a Roche cobas 8000 in France cannot hit desirable measurement uncertainty goals
- Resources
- Sigma Metric Bibliography
- Veterinary Laboratory Quality
- Serology Shortlist for EUA SARS-COV-2 Testing
- This is How you QC
- Advanced QC Strategies Extras
- Advanced QC Strategies
- Cookie Policy for Westgard QC
- Westgard. Where QC Rules.
- Privacy Policy
- Your lab needs help. Westgard's got your back.
- In Memoriam: Per Hyltoft Petersen
- My Mistake: Errata on Planning SQC strategies and adapting QC frequency for patient risk
- It's time to change your tune on QC Frequency
- QC Frequency Calculator (Run Size)
- COVID19 Coverage
- We Wrote the Book on Quality
- We Wrote the Book on Quality
- Worried About Quality? Westgard Can Help
- Basic Method Validation, 4th Edition
- Risk, Error and Uncertainty: Laboratory Quality Management in the Age of Metrology
- Basic QC Practices 4th Edition
- Extras for the Basic Quality Management Systems manual
- Basic Quality Management Systems
- The Poor Lab's Guide to the Regulations
- Extras for the Poor Lab's Guide
- How to Order
- Normalized OPSpecs Chart N=4 90% AQA
- OPSpecs Chart N=4 50% AQA
- Normalized OPSpecs Chart N=2 90% AQA
- Normalized OPSpecs Chart N=2 50% AQA
- Six Sigma Risk Analysis Extras page
- Basic QC Practices Extras page
- Normalized OPSpecs Chart, N=6, 50% AQA
- Normalized OPSpecs Chart, N=3, 50% AQA
- Normalized OPSpecs Chart, N=6, 90% AQA
- OPSpecs Chart N=3 90% AQA
- Order Form
- Six Sigma Table
- Medical Decision Levels
- Glossary of QC Terms
- List of QC References
- ISO Glossary
- Table of Areas beneath Normal Curve
- Basic Method Validation, 4th Edition, extras
- Basic Method Validation, 3rd Edition, FAQs
- Normalized OPSpecs Chart N=4 50% AQA
- OPSpecs Chart N=2 90% AQA
- OPSpecs Chart N=4 50% AQA
- OPSpecs Chart N=4 90% AQA
- QC Selection Grid, Square 1
- QC Selection Grid, Square 2
- QC Selection Grid, Square 3
- QC Selection Grid, Square 4
- QC Selection Grid, Square 5
- QC Selection Grid, Square 6
- QC Selection Grid, Square 7
- QC Selection Grid, Square 8
- QC Selection Grid, square 9
- Sigma Verification of Performance Program
- Torrance Memorial Medical Center Verification of Sigma Performance
- Rajavithi Hospital Laboratory Sigma Verification of Performance
- King Fahd Armed Forces Hospital Jeddah Verification of Sigma Performance
- Hospital 108 Hanoi Verification of Sigma Performance
- Delnor Community Hospital Sigma Verification of Performance
- Queen Elizabeth Kota Kinabalu Sigma Verification of Performance
- Police General Hospital of Thailand Verification of Sigma Performance
- Liuzhou Liutie Central Hospital Guangxi Laboratory Verification of Sigma Performance
- University of Chinese Academy of Sciences Shenzhen Laboratory Verification of Sigma Performance
- 10th People's Hospital of Shanghai Verification of Sigma Performance
- N-Health Bangkok Hospital Sigma Verification of Performance
- University Medical Center Ho Chi Minh City Verification of Sigma Performance
- Beijing Obstetrics and Gynecology Hospital Laboratory Sigma Verification of Performance
- People's Hospital of Fujian University of Traditional Chinese Medicine Sigma Verification of Performance
- Xi'an 4th People's Hospital Sigma Verification of Performance
- Zhejiang Province Hu Zhou Central Hospital Sigma Verification of Performance
- 1st Sun Yat Sen University Laboratory Sigma Verification of Performance
- Laboratorio Colcan Sigma Verification of Performance
- Phyathai 2 International Hospital Sigma Verification of Performance
- King Chulalonkorn Memorial Hospital Verification of Sigma Performance
- Min-Sheng General Hospital Sigma Verification of Performance
- VIVA 1A IPS SA Laboratory Sigma Verification of Performance
- San Giovanni Sigma Verification of Performance
- AMS Clinical Service Center Laboratory Verification of Sigma Performance
- Medic Medical Center Laboratory Sigma Verification of Performance
- Hoan My Da Nang Hospital Laboratory Sigma Verification of Performance
- MIOT Hospital Sigma metric Verification of Performance
- Cedars-Sinai Medical Center Core Laboratory Sigma Verification
- Peking Union Medical College Hospital Sigma Verification of Performance
- First Affiliated Hospital of Xi’an Medical University Laboratory Sigma Verification
- Zhujiang Sigma Verification of Performance
- FV Hospital Sigma Verification of Performance
- Zhejiang Lishui Central Hospital Laboratory Sigma Verification of Performance
- Prince Court Medical Centre Sigma Verification of Performance
- Stamford Hospital Sigma Verification of Performance
- Helix Laboratories Sigma Verification of Performance
- West China Hospital Sigma Verification
- Affiliated Hospital of Qingdao University - Sigma Verification of Performance
- Laboratorio de Analisis Clinicas (LAC) of Montevideo, Uruguay Sigma Verification of Performance
- Yunnan First People's Hospital Sigma Verification of Performance
- Shenzhen Nanshan District People's General Hospital: Sigma Verification of Performance
- Loh Guan Lye Sigma Verification of Performance
- Shandong Provincial Hospital Laboratory Sigma Verification of Performance
- Sigma Verification of Cleveland Clinic Abu Dhabi
- Sigma Verification of Multicare Hospitals and Medical Clinics
- Sigma Verification of Tumor Center Lab of Cho Ray Hospital
- Sigma Verification of Saigon Hoan My Performance
- Sigma Verification of People's Hospital of Xinjiang Uygur Autonomous Region
- Sigma Verification of Shengjing Hospital Laboratory
- Sigma Verification of Clinic Laboratory of Women's Hospital, School of Medicine, Zhejiang University
- Saint Francis Hospital Verification of Performance
- Winchester Medical Center Verification of Sigma Performance
- Wuhan Hospital Sigma Verification of Performance
- Sir Run Run Shaw Hospital Sigma Verification of Performance
- Ruian People's Hospital Sigma Verification of Performance
- Ramathibodi Hospital Lean Sigma Verification of Performance
- Serdang Hospital Sigma Verification of Performance
- Quality Healthcare Medical Service of Hong Kong Sigma Verification of Performance
- Ara Damansara Medical Centre Sigma Verification of Performance
- NGHA Dammam Verification of Sigma Performance
- NGHA Al Hasa Verification of Performance
- NGHA Jeddah Sigma Verification of Performance
- Al Borg Laboratory Dammam - Sigma Verification of Performance
- NGHA Riyadh Sigma Verification of Performance
- Bangkok RIA Laboratory Sigma Verification of Performance
- 2016 Westgard Sigma VP User Meeting: Singapore
- Innovative Diagnostics Sigma Verification of Performance
- Penang Pantai Sigma Verification of Performance
- Penang Adventist Sigma Verification of Performance
- Ramathibodi Hospital Sigma Verification of Performance
- Praram 9 Hospital Sigma Verification of Performance
- Laboratory INVITRO Sigma Verification of Performance
- Siriraj Piyamaharajkarun Hospital Sigma Verification of Performance
- PPUKM Sigma Verification of Performance
- ChiMei Hospital (Yong Kang and Liou Ying branches)
- Sunway Medical Centre - Sigma Verification of Performance
- Bumrungrad International Hospital - Sigma Verification of Performance
- The Medical City - Sigma Verification of Performance
- Westgard Sigma Verification of Performance Program
- Guizhou Provincial People's Hospital
- Zhongshan Hospital Pilot Verification of Performance
- Prodia Laboratories Verification of Performance
- Quality Requirements and Standards
- Method Validation
- ISO
- CLIA
- 2019: CLIA proposed changes to PT acceptable limits
- What went Wrong with CLIA
- EQC = Eliminated QC
- 2016 IQCP Users Survey (USA)
- CLIA QC Clearance Postponed Again & Again & Again & Again
- Final5 CLIA Rule 1/24/03
- CLIA QC and Q-less Compliance
- Testing Equivalent Quality: A Better Way
- Final Rule vs Final Word on Quality
- Quality versus the “No Lab Left Behind” Program
- Equivocal QC: Coming Soon to a Laboratory Near You
- EQC, AQC, and FDA QC Clearance: From control to compliance; from compliant to complicit
- 2008: Update on "Alternative QC"
- Basic QC Practices
- When it is time to wean yourself off warning rules?
- IFCC Global Survey of QC Standards and Practices
- Accentuating the Positive controls for COVID19
- QC 2018: The Truth Standard for Laboratory Testing Still Applies
- A New Look at Italian Error Rates
- A look at pre-analytical error rates, 2014
- Would you drive your car the way you run your QC?
- Re-emerging Issues in QC Today
- Is QC Quality Compromised?
- QC Past, Present and Future
- The QC we really do
- Lab Quality: Puzzle or Mystery?
- Putting Quality into Quality Control
- QC - "Back to Basics"
- What's wrong with traditional quality control?
- DO's and DON'Ts of Quality Control
- Repeated, Repeated, Got Lucky!
- "But...is it really out?" Doing the Wrong QC Wrong
- Guest Essay
- The Terminology of Metrology: Reflections, with particular reference to the case of medical laboratories
- Are we there yet? - COVID19 and the lab, 18 months later.
- Erna Lenters-Westra wins the Westgard Award
- In Memoriam: Elsa F. Quam, MT (ASCP)
- Covid-19 Testing: Maintaining Quality in a State of Emergency
- Key Facts in Covid-19 Testing
- Rilibak: Quality Goals the German way
- The Rong Regulation: Conflicts between NABL 112, CLSI EP23, and ISO 15189
- CLSI EP15-A3: verification of precision and estimation of bias
- Empower IVD Globe Meeting Report
- QC-Dependent Risk Reduction
- Questions on the BioDatabase 2014
- Biologic Variation Database, the 2014 Update
- Dr David Burnett's new book on ISO 15189
- Invitation for Patient Percentile Monitoring
- In Favor of "Full QC"
- Using Allowable Total Error in Assay Migration
- Prepare for Inspection
- Frequently-Asked-Questions on Reference Intervals and Biological Variation
- Hitchhiker's Guide to Measurement Uncertainty (MU) in Clinical Laboratories
- Biologic Variation Database, the 2012 update
- Managing Quality in Networked Laboratories
- Dietmar Stockl, QC Reality Check, Part Five
- Saving money by applying TEa and Six Sigma for internal QC.
- Dietmar Stockl, QC Reality Check, Part Four
- Dietmar Stockl, QC Reality Check, Part Three
- Dietmar Stockl, QC Reality Check, Parts One and Two
- Interpretation of Differences in Serial Troponin Results
- Upgrading Quality Control in Molecular Diagnostics
- Stability Testing and CLSI EP25-A
- Biologic Variation Database, the 2010 update
- Rilibak: Quality Goals the German way
- Are "Scientific Statements" the Scientific Truth?
- Sysmex Perspective on Sigma-metrics
- Time to engage in measurement uncertainty
- Quality of Proficiency Testing
- When Quality depends on the company you keep
- Waiting for the FDA
- Quality Requirements for Veterinary Labs
- Understanding Quality
- Approaches to Clinical Laboratory Utilization Art Eggert
- Tips on Managing the Quality of Immunoassays
- Defect Rates, Quality and Productivity
- What's New With CLIA'88, JCAHO & CAP
- European Approaches to Analytical Goal-Setting
- QC - The Regulations
- TQM for Labs: A European point of view
- Cost-Effective QC for Chemistry and Coagulation
- MV - The Regulations
- Biological Variation Data for setting Quality Specifications
- QC Validation in Veterinary Laboratories
- Report of the Norwegian EQA Validator Workshop
- Trueness and Uncertainty
- Good Laboratory Practice versus CLIA
- Biologic Variation and Desirable Specifications for QC
- CLS: Victims of our own success?
- Biologic Variation: Principles and Practice
- Pre-, Post- & Analytical Errors
- Biodatabase Update 2001
- Quality Requirements Update 2002
- Are Scientific Statements the Scientific Truth?
- Is GUM injurious? - Or just superfluous?
- It's not Rocket Science
- Biological / Desirable Specs for QC, 2004 update
- The latest on Reference Values and Reference Intervals
- The Nordic Reference Interval Project 2000 (NORIP)
- The Quality in the Spotlight Conference
- Quality Management Cocktail ISO, Lean, and Six Sigma
- What are the Risks of Risk Management?
- Biologic Variation and Desirable Specifications for QC, 2006 Update
- Multisite Validation that “Westgard Rules” are cost-efficient and effective
- Quality Goal Index
- Frequency of QC - Implications for Patient Safety
- Biological Variation and Desirable Specifications for QC, 2008 update
- The Skinny on QC Are Laboratory Quality Requirements "Lean"?
- Trends
- FDA on LDT: GED, out!
- No Consenus, No Hierarchy of Prague: Progress or Pandemonium?
- Monitoring the Quality of US Democracy
- Is the future of laboratory AI Automating Inaccuracy?
- AACC, A-u Revoir, CC you later
- Let us now praise famous laboratory professionals
- Of Milestones, Maturing, and Making Progress
- Top Ten Findings of the Global QC Survey
- Misleading Comparisons, Minimal Review, Mars Moving Average Paper
- Strange Victory
- 2020: A Terrible Year with Tremendous Accomplishments
- Trying your patience while trying out Patient-Based QC
- Untruth and Consequences
- Corriendo una maratón: Por alcanzar la calidad en la crisis de la COVID-19
- This is Not a Test
- Sprinting into a Marathon: Striving for Quality in the Covid19 Crisis
- Three Books to make you Think Twice
- LabQuality Days 2019: Reinventing Quality. Reimagining Control
- The 17 Signs of a Struggling (Losing) Laboratory
- Bad Blood for Theranos: A book and Conference Review
- Avoiding the Anguish of Ill-Advised Automation
- Lured by the Low Bid? Labs need to Look before they Leap
- Quexit?, TE-xit? or IQCP-xit?
- Have you been Theranosed? Or are you Theranosing?
- 2016 Westgard Award: Linda Thienpont Pharm, Ph.D.
- Quality in the Spotlight: An Antwerp Accord?
- The Top 5-and-a-half Best LabSafeQuality CompareGrades
- Mini-Review of Milan Meeting
- New Year, New Goals, New Risks
- QC for the Future, Six Years Later
- CLSI EP22: In Memorium
- AACC 2009: More interest in quality, but not QC
- A Hopeful Year 2009
- Trends in Quality Management: Utilization and Outcomes
- Future Directions in Quality Control
- The Myth of Medical Decision Limits
- QC 2000: What changes are needed?
- The FDA-Abbott Consent Decree
- Sage Advice about New Approaches to Quality Control
- Who will care for quality tomorrow?
- Quality is Job 1 when the rubber meets the road
- 2001: Year of the Odyssey
- Has Quality been "Enronned"?
- Cooking the books: Does it happen in the laboratory?
- A momentous happening - A New Way to do QC!
- 2004 JCAHO Patient Safety Goals
- Taking Autoverification to the Next Level – up or down?
- Think straight, Talk straight
- Connecting the Dots to Find Common Causes
- Vioxx and Vaccines, Values and Votes
- Quality Indicators and Benchmarks
- Troubles with Tracking Tests
- CLSI faces the Challenge of Quality
- The Health of US Healthcare
- Tools
- Risk Management
- Risk-Based QC Plans: Clinical Chemistry Journal Club Comments
- IQCP: Does the P stand for Placebo?
- Thinking Fast and Slow about Risk QC
- Talking and tackling Risk-Based QC Plans
- Will Bad Risk drive out Good QC?
- Is Risk Analysis Reliable?
- The Right QC: "Tell me what you heard"
- EQC is out and QC Plans are in
- Identifying Failure Modes
- The Detectability Debate
- Why Six Sigma Risk Analysis?
- Failure Modes of Risk Assessment
- Risk Analysis Methodology
- How is Risk Assessed?
- The Risk Management Process
- First do no harm
- About Us
- Interviews
- Sunway faces down the virus in Malaysia
- Three Waves of SARS-COV-2 at Winchester Medical Center
- The View from St. Petersburg: Helix Laboratories faces the challenge of COVID19
- Multicare Health System: The COVID19 pandemic through the eyes of an 8-lab system
- Cedars-Sinai Medical Center and the Early COVID19 waves
- Egypt: Challenges in Clinical Chemistry QC Practices
- Second City, First Wave: Rush University Medical Center
- In the center of the (US) COVID-19 storm: Interview with Dr. Sam Reichberg
- Interview on Biologic Variation Goals
- Dr. Carmen Ricos and the Biodatabase
- Paul Epner and Labs are Vital
- Interview with a Black Belt
- Interview with a Black Belt: Charleston Area Medical Center & GE
- Interview: Process Metrics "Un-belted" at Covance Central Laboratory Services
- Intro to EP 15 - wth R. Neill Carey, Ph.D.
- Do it Yourself Lean in the Lab
- CAP on Proficiency Testing
- Dr. Jan Krouwer on Risk Management
- What we can learn from World Class Methods
- ISO: Coming to a Laboratory Near You
- Intro to EP 15: with R. Neill Carey, Ph.D.
- Basic QC Practices
- Double-Blind QC: What Manufacturer Means and Ranges Miss
- Secrets of Screening QC
- Sigma-metrics of Lab Processes, 2012
- Error Rates in the Total Testing Process
- Pre-Analytical and Post-Analytical QC
- QC Practices for Molecular Testing
- QC - The Chances of Rejection
- QC - The Records
- QC - Proficiency Testing, EQC, and Peer Groups
- QC - The Idea
- QC: The Levey-Jennings Control Chart
- QC - The Materials
- QC - The Calculations
- QC - The Chances of Rejection
- QC - The Multirule Interpretation
- QC: Levey-Jennings: Answers
- QC - The Records
- QC Calculation Problem Set
- QC Calculation Problem Set - Answers
- Quality Management
- What about Bias?
- Quality Planning Models - The Math
- What is QC Validator?
- QC - The Planning Process
- Power Function Graphs
- Critical-Error Graphs
- OPSpecs Charts
- Quality Planning Models
- Total Quality Control Strategies
- Normalized OPSpecs Charts
- QC Selection Grids
- Area Under a Table
- Assessing the time to rejection for QC procedures
- Advanced Quality Management / Six Sigma
- Secrets of Better Sigma Metrics, Part Two
- Secrets of Better Sigma Metrics, Part One
- 2018 Global Six Sigma Survey Results
- Seven Tips to Better Sigma in '17
- When manufacturers make mistakes
- Quality Goals, Systems, and Specifications
- Surpassing Six Sigma
- Translating Method Validation Data into Sigma Metrics
- Six Sigma Basics: Process improvement, goals and measurements
- Thinking about Three Sigma
- Six Sigma Basics: Outcome Measurement of Process Performance
- Six Sigma: Quality Design and Control Processes
- A Six Sigma Design Tool
- Six Sigma Design and Error Budgets
- From Precision Claims to Six Sigma Estimates
- Patient Safety Concepts
- High Reliability
- ISO
- ISO 15189:2012 Medical laboratories - Requirements for quality and competence
- ISO 9001:2015 Quality Management Systems Requirements
- ISO-1: Basics on ISO Standards
- ISO-2: ISO 9001:2000 and Quality Management Systems
- ISO-3: The 15189:2003 Standard
- ISO-4: ISO 14001:2004 and Environmental Management
- ISO 15189 QSE 5.6: Assuring the Quality of Examination Procedures
- Glossary of ISO Terms
- Basic Planning for Quality
- QP 1: A Wake-up call for Quality Management
- QP 2: Assuring Quality Through Total Quality Management
- QP 3: Complying with Regulations, Standards, and Practice Guidelines
- QP 4: Devising a Practical Process
- QP 5: Defining Quality Requirements
- QP-6: Adopting the OPSpecs Chart as Your Planning Tool
- QP-7: Formulating a Total Quality Control Strategy
- QP-8: Implementing a manual process using Normalized OPSpecs charts
- QP-9: Practice makes Proficient
- QP-10: Automated Chemistry Applications
- QP-11: Blood Gas Applications
- QP-12: Immunoassay Applications
- QP-13: Coagulation Applications
- QP-14: What's wrong with statistical quality control?
- QP-15: Frequently-Asked-Questions about Quality Planning
- Basic Method Validation
- True or False? You can validate a qualitative method
- Probit Analysis, Part Two
- Una revisión del valor predictivo de las pruebas de laboratorio
- Calculadora web para tabla de contingencia 2x2
- Probit Analysis, Part One
- COVID-19 Serology Testing Strategy: Confirm Positive Results
- A Review of Predictive Value of Laboratory Tests
- Estimating Clinical Agreement for a Qualitative Test: A Web Calculator for 2x2 Contingency Table
- Calibration Verification Criteria for Acceptable Performance
- Determining Inaccuracy
- Selecting a Method to Validate
- The Experimental Plan for Method Validation
- The Replication Experiment
- The Comparison of Methods Experiment
- The Data Analysis Tool Kit
- The Decision On Method Performance
- The Linearity or Reportable Range Experiment
- Interference and Recovery Experiments
- The Management of Quality
- The Detection Limit Experiment
- Reference Interval Transference
- Basic validation of qualitative tests
- Z Stats / Basic Statistics
- Z-1: Aligning Attitudes Through Purpose
- Z-2: An Organizer Of Statistical Terms (Part I)
- Z-3: An Organizer Of Statistical Terms (Part II)
- Z-4: Mean, Standard Deviation, And Coefficient Of Variation
- Z-5: Sum of Squares, Variance, and the Standard Error of the Mean
- Z-6: Probability and the Standard Normal Distribution
- Z-7: Hypothesis Testing, Tests of Significance, and Confidence Intervals
- Z-8: Two-Sample and Directional Hypothesis Testing
- Z-9: Truth or Consequences for a Statistical Test of Significance
- Z-10: ANOVA
- Z-11: Confidence Intervals
- Z-12: Correlation and Simple Least Squares Regression
- Z-13: The Least Squares Regression Model
- Z-14: Estimating Analytical Errors Using Regression Statistics
- Questions
- Questions from the 2024 CLIA GAMECHANGE webinar
- Questions from the Repeat-Patient QC webinar
- Un-conventional Answers to Un-conventional Questions
- Questions on Patient re-testing after being out-of-control
- What the Warning Rule Misses - differences in detection for different Westgard Rules
- Chronic Questions on QC Frequency
- Questions on QC during Lab Week 23
- Questions from "Chasing the Mean" Zoom
- Questions from the "Toeing the Line" Zoom
- Questioning Six Sigma metrics for the Laboratory
- Questions from the Sigma Stronger webinar
- Questions from the 2021 Quality in the Spotlight Masterclass
- Questions and Answers from the 40th Birthday of Westgard Rules
- Questions from Breaking all the Rules
- When your QC is a flat line
- Questions about QC for Multiple Instruments and Multiple Labs
- 20 Questions on Hematology QC
- Questions on QC Frequency
- QC Planning for a Calcium Method
- FAQ's of QC Validator 2.0
- FAQ's about Multirule QC
- FAQ's about Power Function and Critical-Error Graphs
- FAQ's about OPSpecs Charts
- Multirules and QC Validator
- FAQ's on CLIA’88, JCAHO and CAP Requirements
- FAQ's about controls and out-of-controls
- FAQ's on Trends, R4s rules and more
- FAQ's on Method Validation
- Method Validation: Class Questions
- FAQ's on N, runs, control limits
- AACC Expert Access Questions & Answers - Six Sigma
- Quintiles and Quality: QC for hs-CRP
- Ten Ways to do the Wrong QC Wrong
- Housekeeping
- Free Membership (It's Free)
- The New Westgard Web
- Education and Training in Analytical Quality Management, Part One: Developing A "Lesson-Base"
- Quality and Commerce
- Education and Training in Analytical Quality Management, Part Two: Developing Internet Courses
- Education and Training in Analytical Quality Management, Part III: Basic QC Training
- Education and Training in Analytical Quality Management, Part Four: Internet Tools for QC Training
- WQC Y2K: Plans, Priorities, and Predicaments
- Quality: "I think I get it now!"