I've lived through three institutions transitioning to electronic records. Two hospitals in my training program went to Docusys. Of course it happened at different times and each hospital decided to do things differently. And of course staff were equally clueless for each transition.
Where I work now we went from paper to innovian just after I showed up. I had used innovian at the VA hospital where I trained, so not as painful.
Innovian is nice because its a Draeger product and talks nice to the machines. One of the biggest problems I've seen is getting the record keeper program to talk to the hospital's EMR. That was a big issue with our docusys transition, and with my current gig we still print the record from innovian and put it in a paper chart. 😱
I haven't been involved in the nuts and bolts of a transition, just an end user, but in comparing innovian vs docusys, innovian seems to a be better off the shelf. Docusys required lots more tinkering to get things working correctly.
I haven't used the cerner product, but direct integration with the hospital EMR could be a huge savings, but those I know who have looked at it and really didn't like the interface.