# Uncertainty

• ### How to Find Significant Contributors to Measurement Uncertainty and Automate the Process in 5 Steps

Introduction Ever wondered what factors are significant contributors to uncertainty in measurement? Are you performing an uncertainty analysis and wondering what components to include in your uncertainty budget? Maybe an assessor cited you a deficiency and recommended that you include more sources of uncertainty in your budgets. Afterward, they provided you with a laundry […]

• ### Type A and Type B Uncertainty: Evaluating Uncertainty Components

Introduction Type A and Type B uncertainty are two elements that are commonly discussed in estimating measurement uncertainty. Uncertainty type is covered in most measurement uncertainty guides and uncertainty training courses. Auditors review uncertainty budgets to make sure the components are categorized correctly. However, have you ever looked at most of the information published […]

• ### How to Create a Scope of Accreditation for ISO/IEC 17025 Laboratories

Introduction A laboratory’s scope of accreditation is a key element of ISO/IEC 17025 accreditation and a vital asset to your customers. It lists all of the activities that your laboratory is accredited perform. However, many laboratories forget to consider its importance when getting accredited or reaccredited. They just rush to develop a scope of […]

• ### How to Create An Uncertainty Budget in Excel

Introduction Estimating uncertainty can be a difficult task, especially if you are a beginner. Tools like an uncertainty budget or calculator can really make a big difference. However, software to calculate uncertainty is typically outdated, expensive, and difficult to learn. Many people have problems because they do not know what to do or where […]

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• ### 5 Reproducibility Tests You Can Use For Estimating Uncertainty

Introduction Reproducibility testing is an important part of estimating uncertainty in measurement. It is a type A uncertainty component that should be included in every uncertainty budget. However, a lot of laboratories neglect to test reproducibility and include it in their analyses. When talking with clients and friends, I get a lot of reasons […]

• ### How to Calculate Sensitivity Coefficients for Measurement Uncertainty

Introduction Have you ever considered using sensitivity coefficients when estimating measurement uncertainty? Maybe you have seen sensitivity coefficients used in an uncertainty budget and wondered why they were used or how they were calculated. If you answered yes to any of the above statements, this guide is for you. Today, you are going to learn […]

• ### 15 Places to Find Uncertainty in Measurement

Introduction One the most difficult things about calculating uncertainty in measurement is finding sources of uncertainty. It is a process that can require you to conduct hours of research. Seriously! You could waste hours of your life researching sources of measurement uncertainty. It can be even worse if you have no idea where to look […]

• ### 8 Free Uncertainty Calculator Software You Can Download Now

Introduction Need a measurement uncertainty calculator? If are an ISO/IEC 17025 accredited laboratory, it is in your best interest to have software for estimating measurement uncertainty. Additionally, if you are like me, you have most likely searched online for uncertainty calculator software. Did you find measurement uncertainty software that you like to use? If so, […]

• ### How to Add An Uncertainty Calculator to Your Calibration Checklist

Introduction Calculating uncertainty in measurement can be difficult. Especially, now that you are required to calculate the uncertainty for every measurement result in your calibration reports. For years, many laboratories have just included a statement of uncertainty hidden in the small print of their reports that only provide the CMC Uncertainty statement published in their […]

• ### Calculating Uncertainty: 10 Terrible Mistakes You Need to Avoid

Introduction Calculating uncertainty is not easy. It is a skill that requires education, training, and hours of practice to master. This is why it is one the top 10 deficiencies in ISO/IEC 17025 audits. Whether you are a beginner or an expert at calculating uncertainty, I am sure that you have made mistakes. In […]

• ### 4 Ways to Calculate Uncertainty in Microbiology Labs

Introduction Calculating measurement uncertainty in microbiology labs has become quite a challenge. With the enforcement of the Food Safety Modernization Act, there has been a significant increase in the number food microbiology labs seeking ISO/IEC 17025 accreditation. However, there is not a lot of helpful information, guides, and courses available to teach measurement uncertainty […]

• ### How to Calculate Resolution Uncertainty

Introduction Resolution Uncertainty is a factor that contributes to uncertainty in measurement. It’s influence should be considered in every uncertainty budget. However, evaluating resolution uncertainty can vary depending on several factors. So, I have created this guide to help you appropriately identify and evaluate the resolution uncertainty of various measurement equipment. In this guide, I […]