Here are articles about QA published by Pfx team. Note these articles should briefly describe how we see the topic, they are not describing all details used on projects:
Testing on IT projects
general article about why testing is normal part of IT projects and why it is not possible to have software without bugs - https://www.pricefx.com/learning-center/myths-and-truths-about-software-testing/
UAT phase
general instructions for UAT phase, what to expect and why UAT phase is so important - https://www.pricefx.com/learning-center/what-is-uat-and-why-you-need-it/
Testing during UAT phase
tips how to handle UAT phase smoothly, examples of UAT test cases - https://www.pricefx.com/learning-center/how-to-perform-user-acceptance-testing/ , https://www.pricefx.com/learning-center/end-to-end-test-cases-examples-for-pricing-software/
Test automation
manual vs automation - the article was not published yet, in the meantime, please check Truths and Myths page
Testing after upgrades
why to test after upgrades, when test automation can help - the article was not published yet, in the meantime, please check Truths and Myths page