At MagentoLive Europe I was able to sit down with Gary Specter, Vice President, Global Head GTM, Commercial at Adobe, and ask him three questions live during a livestream from the event! #MLEU #ecommerce.
Recently I've seen some (often absolute) statements going around, generally in the line of "open source commerce platforms are a terrible idea". Now of course different solutions always have different pros and cons.
A hierarchy of evidence (or levels of evidence) is a heuristic used to rank the relative strength of results obtained from scientific research. I've created a version of this chart/pyramid applied to CRO which you can see below. It contains the options we have as optimizers and tools and methods we often use to gather data.