To successfully convert clinicians requires understanding what they need to do their job. And saving the medical records department five hours won't matter if it adds, even nominally, to the workload of physicians. They just won't use it. However, to eliminate running dual paper and electronic systems and relieve the medical records department from constantly servicing chart requests, workstations need to be rolled out to patient care areas and used by clinicians. This requires total commitment from senior management, clinicians and IS over the term of the project.
Target information needs.
The system needs to provide the right information to the target audience. For example, emergency room physicians normally need more than just ER charts. So scanning ER charts first does not necessarily make a good base for first rollout. If the scanning team scans all the ER charts and the workstations go to the ER department, the ER physicians will immediately find the system lacking the information required for patient care. Consider staffing needs.