Together with Michele Miller, Sr. manager of Solutions Innovations at Adobe, I was invited to host the Commerce Sneaks session at MagentoLive Europe 2019 in Amsterdam. Amazing to see the innovations that the community has come up with in the half year since the previous Commerce Sneaks at Imagine!
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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.