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On Friday 12th and Saturday 13th of June the fourth edition of the Dutch Joomladays will take place in the Mercure Hotel in Nieuwegein, The Netherlands. And this year, I will be the main organizer of the event! Hundreds of open source experts and business users will attend the event to gain knowledge, exchange experiences and to meet al the (in)famous people in the Joomla community. We have well know speakers from all over the world like Johan Janssens, Brian Teeam, Fotis Evangelou, Gary Brooks and Hannes Papenberg presenting on different interesting subjects. Every day will end in a small party with music, 'Joomla Jeopardy' and of course some drinks! Luckily, I don't have to do this all on my own, I have a wonderful team of Dutch Joomla enthusiast who help bringing this event to greater hights. New this year are the training courses and the 'Doctor Joomla' sessions. We also have 7 world premiers at our event, one of them being the first view at the next major Joomla edition (version 1.6) by core team member Hannes Papenberg. Ofcourse we have a (Joomla) website with more information about the event and how to get your tickets: www.joomladays.nl.
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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.
