How to do logical testing of medical software

First of all, we have to ensure that the normal business flow of the software is OK, in fact, is to consider the system's handling of the abnormal flow of the situation, as well as interface testing, ease of testing, database testing, performance testing (some systems may also have to carry out compatibility testing, security testing, installation and uninstallation testing ...) ... If there is no demand, more to develop and demand communication it, through the communication with them to obtain demand, if it is verbal, you can organize themselves and then operate the real system, or look at their previous BUG library, use cases, manuals, etc., their own summary of it or not to go to the Internet to find the peer product (generally does not seem to be the only company to do the product, right), you can get through the peer product demand ha ha ..... Finally, ask the owner, in that company ah, convenient to disclose it, I looked for a lot of companies this year, is not to find a suitable medical software company, because my first professional for the medical, it is more interested in this type of products ...