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Why your laboratory should never use ordinary linear regression in method comparisons & what to do instead

A few weeks ago we discussed how to estimate the average bias over the whole measuring range. We also discussed how to recognize situations where the average bias gives enough…

By Eeva Pursula
February 5, 2021

Setting up your big verifications in Validation Manager (simple but essential tips)

Users who are new to Validation Manager often ask us for a recommendation on how to organize their oncoming big verification in Validation Manager. This is a very good question…

By Eeva Pursula
December 11, 2020

How to estimate average bias & use Bland-Altman comparison – tips & examples

Last year we discussed the overall idea of bias in our blog post what you measure when you measure bias. Lately we’ve realized that there is need for a more thorough…

By Eeva Pursula
November 19, 2020

Want to climb up the laboratory quality ladder? Automated verification reporting is the first step

We recently introduced the concept of quality steps in our blog. To make it more concrete and give you some ideas on how to climb up the steps, let’s discuss…

By Eeva Pursula
October 12, 2020

The most common mistake laboratories make with correlation coefficient (and how to fix it)

Discussions with many of our customers have revealed that when a laboratory compares two methods or instruments as part of their verification, they usually calculate the correlation coefficient. If we…

By Eeva Pursula
September 22, 2020

Quality steps – where do you stand?

Years of working closely with laboratories have taught us that the mindset in different organizations towards validations and verifications – and quality in general – varies a lot. The benefits…

By Eeva Pursula
June 3, 2020

Enabling quality in the face of restrictions

COVID-19 has impacted our ways of working throughout the world. Due to recommendations and restrictions, remote work has become the new normal for everyone whose work does not require physical…

By Eeva Pursula
April 30, 2020

The numbers we don’t see in COVID-19 news

It has been kind of frightening to see, how much criticism there is for the low amount of COVID-19 testing, where the underlying assumption seems to be that the pace…

By Eeva Pursula
April 16, 2020

The secret to verifying your tests fast

When a new test is developed or taken to use in your laboratory, you need to do a statistical evaluation of different performance characteristics of the test. This means testing…

By Eeva Pursula
April 10, 2020

COVID-19 and how are the tests validated?

Due to the current coronavirus situation, there has been a lot of talk about COVID-19 tests. The general public is mostly concerned about the amount of testing, but there has…

By Eeva Pursula
April 6, 2020

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