Use a Java library instead of R to calculate mean response time etc.
Use a Java library, such as Apache Commons Math, that can be provided via the update sites instead of R to calculate mean response time etc., so that PerOpteryx works even if R is not installed.
Apache Commons Math: http://commons.apache.org/proper/commons-math/
Need to adjust mainly SimuComAnalysisResult, maybe others.
Probably need to add the selected java library to the ThirdPartyWrapper, see https://svnserver.informatik.kit.edu/i43/svn/code/ThirdPartyWrapper/trunk/org.apache.commons.collections15 as an example how to do that
Maybe keep R dependency for some special cases (antipatterns?), but "normal" PerOperyx run should not depend on it.
Requirements Category: I'd say some kind of operation environment tolerance, so that would be operability in Volere