• How to Perform A Repeatability Test 2:

    Collecting Data The number of samples collected during experimentation has an effect on the analysis of results and the validity of the test data collected. Over the years, I have observed several conflicting accounts of how many samples one should collect during experimentation. According to many introductory statistics textbooks, the number of samples collected depends […]

  • How to Perform A Repeatability Test 1:

      The evaluation of uncertainty in measurement results is becoming an important requirement for laboratories seeking to attain or retain ISO/IEC 17025 accreditation. When assessors evaluate a laboratory’s uncertainty budgets, they commonly look for the inclusion of type A, or actual test, data. Type A data may include, but is not limited to, evaluations of […]

  • Uncertainty Budget Definitions

    In 2013,  business has been great! I increased my client-base, my bottom-line, and the awareness of my company, ISOBUDGETS LLC. As a result, I have received a lot of questions this year, from both clients and assessors, regarding the definitions of the terms used in my reports. Therefore, I have decided to create this post in order […]

  • NCSLI VA Section Meeting | Nov 7, 2013 | VA Beach, VA

    Mid-Atlantic Region – Virginia Section Meeting (1213) View Larger Map NCSLI Virginia Section Meeting 1213 Thursday, November 7, 2013 Please Join Us! Register Here NCSLI Coordinators Name and Meeting Contact: Richard Hogan ACR Technical Services, Inc. 710 Industrial Park Dr. Newport News, VA 23608 757.812.9115 Region/Section Number and Name: Virginia Section 1213 Meeting Date: Thursday, November […]

  • Confidence Intervals and Risk in Measurement

    When performing experiments, we expect to achieve an approximation of confidence in the results of our observations. When our confidence is high, we typically expect our risk of failure to be low. Therefore, it is important to understand the importance of confidence and risk when estimating the uncertainty in our measurement results. What is a […]

  • ISO 17025 Assessments: Defending Your CMC Uncertainty Calculation

    Receiving a ‘TBD’ (To Be Determined) during an ISO 17025 assessment can be aggravating. A ‘TBD’ is when an assessor marks one or more portions of your Scope of Accreditation as questionable or incomplete. Typically, this is related to a laboratory’s CMC uncertainty statements. If left unresolved, the ‘TBD’ items are permanently removed from the […]

  • 7 Performance Metrics to Optimize Laboratory Quality and Productivity

    Do you know the key performance metrics for your laboratory? The majority of successful laboratories have two common traits; they are effective and efficient. They accomplish their tasks faster than other laboratories and they get it right the first time. This balance of quality and quantity is the result of hard work, dedication, and leadership. […]

  • Best Measurement Uncertainty Guide for Beginners

    Estimating measurement uncertainty is becoming common practice in the Metrology industry. To adhere to the requirements of the ISO 17025 standard and the policies of ILAC, laboratories are obligated to report the measurement uncertainty associated with a given measurement result. Laboratory technicians and personnel who are unfamiliar with this task may have a difficult time […]

  • Why Measurement Uncertainty is Important

    Quantitative measurements are performed each day. The accuracy of these measurements is determinate upon an established set of requirements. One organization may require low accuracy measurements while another may require high accuracy. Despite the established requirements, no measurement is exact. No matter how careful or accurate, every measurement result contains an independent amount of uncertainty. […]