One of the goals in web performance (and user experience) is the ability to correlate metrics to business outcomes with certainty. While often organisations store a breadth of data, this is still a difficult task. In this issue, we feature Farfetch, which created an internal tool to assign potential business impact to performance improvements. This certainly can be one way to convince your stakeholders!

Can we then 100% rely on data to do the convincing? I don’t think so. Hesitance toward page speed work can come from various sources, as I described in <a class="editor-rtfLink" href="https://calibreapp.com/blog/convince-your-boss-about-performance" style='color: #4a6ee0;background: transparent;margin-top: 0pt;margin-bottom: 0pt;border-collapse: collapse;mso-line-height-rule: exactly;font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";text-decoration: none;font-weight: normal;margin: 0;padding: 0;mso-effects-shadow-color: #2B2B2B;' target="_blank"><span data-preserver-spaces="true" style="background: transparent;color: #4a6ee0;margin-bottom: 0pt;margin-top: 0pt;border-collapse: collapse;mso-line-height-rule: exactly;">How to Convince Your Boss to Care About Speed</span></a>. Some of the reasoning can be a lack of knowledge or one of the base human emotions: fear of the unknown. 

We can use data to help us make specific points and back up hypotheses. But at the end of the day, it’s people who we have to persuade, not computers, that crunch the numbers.