in-process means the CHC is going to verify all documents which you submitted with your full application , background check, security check , bank statement which you provided etc, if any documents are not enough then VO will request you but not in all cases, in lots of cases VO reject application after "in-process" status, for example, if you submitted your bank balance which is required for FSW PR and you withdraw some money, & VO make inquiry with your bank that time balance is not enough then sure it will rejected. but it's good +ve sign to get meidcal soon within 2months to 3months time frame if your CHC will move fast (follow your local CHC time frame), even you waived interview, and your documents are good submitted with full application, otherwise VO will request for remaining documents so, it will take time to get medical request ultimately your application will slow. just follow your e-case status.
Himanshu2277