Introduction to Quality Control (by LabCE)

1 P.A.C.E. contact hour(s)

(based on 953 customer ratings)

Authors: Jean Houger Hengesbaugh, MS, CLS(NCA) and Brad Westover, BS
Reviewer: Alex Casapu, MBA, MLS(ASCP)CM

Course provided by LabCE.

This course presents the basics of quality control in the clinical laboratory. Topics include assayed and unassayed controls, Levey-Jennings plots, Westgard rules, and standard deviation.

See more courses in: Quality Control & Lab Math

Included In These Course Packages

Continuing Education Credits

P.A.C.E.® Contact Hours (acceptable for AMT, ASCP, and state recertification): 1 hour(s)
Course number 578-009-21, approved through 2/28/2023
Florida Board of Clinical Laboratory Personnel Credit Hours - Supervision/Administration, Quality Control/Quality Assurance, and Safety: 1 hour(s)
Course number 20-814920, approved through 2/28/2023


  • Explain the purpose of a quality control program.
  • Define assayed and unassayed controls and the advantages/disadvantages of each type.
  • Discuss various quality control tools.
  • Prepare a Levey-Jennings control chart.
  • Explain the Westgard QC multi-rule approach.
  • Define random and systematic errors and causes for each.
  • Define accuracy and precision and discuss the statistical tools that are used to monitor each.

Customer Ratings

(based on 953 customer ratings)

Course Outline

  • Introduction to Quality Control
      • Quality Control and a Quality Control Plan
  • Quality Control Tools
      • Quality Control Tools
      • Intralaboratory (Internal) Quality Control
      • Assayed and Unassayed Controls
      • Internal Quality Control Program
      • Determining the Frequency for QC Testing
      • Additional Variables
      • Instrument Maintenance
      • Record Keeping
      • External Quality Assessment
      • Delta Checks
  • Statistical Analysis of Control Data
      • Accuracy and Precision
      • Mean and Standard Deviation
      • Calculating Acceptable Ranges
      • Calculating Acceptable Ranges, continued
      • Coefficient of Variation
  • Quality Control Charts
      • Levey-Jennings Quality Control Charts
      • Random and Systematic Error
      • Random and Systematic Errors, continued
      • Westgard Multi-Rule Approach
      • Westgard Multi-Rule Approach, continued
      • Responding to Out-of-Control Results
  • References
      • References

Additional Information

Level of instruction: Basic

Intended Audience: Medical Laboratory Scientists, Medical Technologists, and Medical Laboratory Technicians, Clinical Laboratory Science students.

Course Information: This course provides important basic concepts in quality control that are useful to laboratory personnel who report patient results. Topics include: precision, accuracy, random and systematic errors, standard deviation, mean, and coefficient of variation, quality control tools and an overview of the Westgard multi-rule approach for evaluating QC results. 
Author information: Brad Westover received his BS in Physics in 2006 from the California Institute of Technology. He is currently pursuing a Ph. D. at the University of California, San Diego.
Reviewer Information: Alexandru Casapu, MBA, MLS(ASCP)CM, PBTCM has over 20 years of experience as a medical laboratory scientist, section supervisor, and laboratory manager. He is the former Director of Clinical Laboratory Technology Program at Georgia Piedmont Technical College. He is currently a Program Director at MediaLab, Inc. Alexandru holds BS degrees in Biology and Medical Technology from Clark Atlanta University and a MBA from the University of Georgia.

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Course provided by LabCE.



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