Some of the important factors which actually contribute to acceptance of EHR as well as any other electronic system is much covered in the Technology Acceptance Model (TAM). Perceived usefulness is interlinked with perceived ease of use and  intention to use the system which ultimately leads to usage behaviors. This is especially important in the context of health care providers as professionals in health would rarely have time to learn a difficult system and they would be participating and contributing only if there is perceived benefit which will lead to positive outcomes in alleviating the work or increasing efficiency as well as leading to improvement in patient services. In developing countries much of EHR successful implementation will also depend on infrastructure (such internet connectivity) available. 

In my country, the main factor is the obligation of the National Health System.

The factor affecting professionals is the ability to query the EHR, and everywhere any time, without waiting for paper files.

How are including all supplementary pruevas is a breakthrough.

the major influences for use of EHR by service providers is that institutional memory can be built which can later be used for analysis and insight. With the number of patients growing, alternative system does not offer any effective management. Moreover, Insurers believe that EHR will provide them with the basis for risk rating in the long run.

Also the service providers expect to get a lock-in from the customers by maintain the records , which makes understanding history becomes easy. 

It my opinion it provides efficiency in the delivery system, significantly.

If, because providers accept salut HCE, is for the accumulation of data and statistical prediction, not so much, I think, to control patient