The phrase "a beneficial example" is correct and usable in written English.
You can use it when referring to an instance or case that provides a positive or helpful illustration of a concept or idea.
Example: "The study provided a beneficial example of how community engagement can improve local health outcomes."
Alternatives: "a helpful illustration" or "a positive case study".
"That's everybody's challenge: come up with a clearly beneficial example of financial innovation without mentioning A.T.M.s, and no one can do it.
One further beneficial example of ROS at low/moderate concentrations is the induction of a mitogenic response [ 4].
One further beneficial example of ROS seen at low/moderate concentrations is the induction of a mitogenic response.
Abelard maintains that we should punish her for the beneficial example her punishment may have on others: it may make other poor mothers more careful not to accidentally smother their babies while trying to keep them warm.
However, they may present at the next therapy session and describe one excellent (and extremely beneficial) example of how he/she practiced homework over the past week.
Some beneficial examples of e-healthcare system (reported by IBM in 2013: http://www03.ibm.com/industries/ca/en/healthcare/documents/Data_driven_healthcare_organizations_use_big_data_analytics_for_big_gains.pdf).pdf
Research on targeting low-uptake groups has typically used customised approaches and, on balance, shows a beneficial effect – for example, strategies such as tailored telephone counselling seem to improve uptake (Luckmann et al, 2003).
The first sensitivity analysis is a 'best-worst-case' scenario where it is assumed that all participants lost to follow-up in the experimental group have had a beneficial outcome (for example, had no serious adverse event); and all those with missing outcomes in the control group have had a harmful outcome (for example, have had a serious adverse event).
Unfortunately, this can lead to Simpson's paradox [ 19], where (for example) a beneficial effect in each study can become an apparently detrimental effect when the data are aggregated.
