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Method Selection, Validation and Demonstration of Capability (DOC)

An Essential Component of the Measurement Process


Who Should Attend?

  • Data Users
  • Laboratory Management
  • Quality Assurance and Technical Staff
  • Assessors

This 3-hour webcast reviews materials and techniques that laboratories, data users and assessors can use to successfully address the challenges of method selection, validation and Demonstration of Capability (DOC). A strong focus is on understanding some of the background, theory and practical considerations associated with selecting and validating test methods to be used to generate data of known and documented quality.

The method selection, validation and DOC requirements in the TNI Standard (Module 2 Section 4.5 and Module 4, Sections 1.4, 1.5 and 1.6) tend to be very confusing to laboratory managers and assessors. A good deal of the confusion centers on "what is needed," "why is it needed" and "how does this apply to my laboratory." This workshop explores the "life cycle” of measurements and the part that proper selection and validation of test methods plays in the overall generation of data of known and documented quality. This session exposes participants to a body of knowledge on methods and options as well as the practical considerations and benefits to proper validation of methods.

The course will focus on practical definition and use of these concepts, review of current EPA requirements, the 2016 TNI standard, actual real life options and considerations as well as documenting and retaining validation data. The course will cover the various options for initial and continuing DOCs with practical examples.

The course will also discuss the concept of "legally defensible data" and how and why method validation is a key component of this topic.


The Measurement Life Cycle

  • Planning
  • Sampling
  • Method Selection and Validation and DOC
  • Quality Control
  • Data Assessment

Ensuring Legal Standing


  • Understand the "Measurement Life Cycle"
  • Immerse you in the body of literature on method selection and validation principles
  • Provide background on why Method Selection and Validation are part of the TNI accreditation standards
  • Understand the differences between validation of Reference, Non Standard and Lab-modified Methods
  • Simplify and reduce some of the confusion with the Demonstration of Capability
  • Bring some overall good science into the analysis process
  • Show its relevance in the overall measurement process
  • Show its relevance for "legally defensible data"


CEUs: 0.3

Note: A certificate is not provided with the class. Certificates may be purchased. A passing score of 2/3 or more is needed to receive CEUs and a Certificate of Completion. If a lower score is received, a Certificate of Attendance and no CEUs are awarded. 

Course Fee:
$60 for TNI members; $75 for all others; $250 group rate for 5 or more students

TNI Members: you must be logged-in to the website to receive the member rate.

About Webcasts:
 Upon receipt of your payment, you will receive a special link by e-mail to watch the webcast on your computer. The link is time-limited: you will have full access to the webcast and any associated handouts for 6 months after receipt of payment, at which time the link will expire. Webcasts cannot be downloaded; they are intended for viewing on your computer only during the 6-month window. If you have any questions, please contact Ilona Taunton at

No certificates are provided with webcasts. There will be an additional charge of $15 per person. If you complete the quiz (send to Ilona Taunton at along with course receipt and completion date) and receive a score of 2/3 or higher, a Certificate of Completion and CEUs will be awarded. If you do not want to take the quiz or a lower score is received, a Certificate of Attendance will be provided. If you did not purchase a certificate when you registered for the course, contact Ilona Taunton at

Group rates are available: Each purchased webcast is to be viewed by only one student. If you would like multiple viewers, separate purchases must be made. A group rate of $250 is available for groups of 5 or more students at a single location. Click hereto purchase this webcast at the group rate.


3 hours

This course has been reviewed and approved by TNI.

Presented By:

Jerry Parr

About the Presenter:
Jerry Parr is the Principal Scientist with Catalyst Information Resources, a company focused on providing current relevant information on environmental laboratory issues. He also serves as the Executive Director for The NELAC Institute, serves on the Advisory Board for the Environmental Laboratory Washington Report, and is the conference organizer for the National Environmental Monitoring Conference. He has a BS in Chemistry from the University of Texas at Austin and has 40 years of experience in environmental analytical chemistry.