a little more detail from the funnel analysis of UploadWizard (if you haven't been following the other funnel thread, [[mw:UploadWizard/Funnel_analysis]] has a quick summary).

The main thing I am trying to understand at this point is why people use the "upload another file" button so much. UploadWizard allows uploading up to 50 files at the same time, which should be more then enough for the average user, but our click-tracking data shows that most people click through the tutorial-file-deed-details-thanks screens, then click on the upload more button (which effectively resets the process and starts again from the file screen), then click through the screens again, then click on the upload more button again, then do the same again, and again, and again. (Doing this fifty times in a row is not uncommon.) This suggests some fundamental failing in UW - Sage suggested it is the instability of uploading more than a few files at the same time. I wonder if others have relevant experience?

I have tried to identify the reason for failed UploadWizard sessions (a series of UploadWizard events logged on the same page which are not terminated by reaching the thanks page) by checking what the last event was, and assuming that for failed sessions caused by errors, that error would be the last event. Assuming this is sound, errors do not seem to be the main problem - they only appear at the end of ~25% of the failed sessions (which is ~8% of the total sessions).

That said, here is a list of error codes (these are mostly API error codes, but a few are internal to UploadWizard) sorted by frequency, collected over ~1000 sessions: