The phrase "measurable effect" refers to a noticeable outcome or impact that can be identified, observed, and quantified using some form of measurement or criteria. Full definition
Only one - third of the programs had well - developed evaluations that produced measurable effects on student achievement or change in instructional practices. (edutopia.org)
The applicant mentions a specific, measurable effect of his efforts (32 percent budget reduction) and describes what he did to achieve this result. (resume-now.com)
Why have decades of school reform had so little measurable effect on student achievement? (ascd.org)