Switch over
"A spokeswoman said the transfer would be module by module, not a whole system switchover, which El Reg presumes is meant to reassure folk there won't be an IT disaster involving the billions of health-related documents held by EMIS."
This isn't reassuring to me, I foresee databases getting out of sync. And that is going to be extremely nice when one medication interacts with another and the prescription for each being in a different database due to that out of sync situation.
I've already seen similar things in a previous job. Fortunately, it didn't involve medication and lives. And due to a confidentiality clause in my contract, I can't tell anything more about it.