The phrase "demonstrable success" means having clear and provable achievements or accomplishments that can be shown or proven to others. Full definition
Top - performing, results - oriented hospitality - management professional with many years of progressive experience and a strong track record of demonstrable success managing flagship hotels as well as independent ownership. (members.climber.com)
We can point to many places where innovation at high - quality charter schools has produced demonstrable success in closing achievement gaps; creating academically successful, racially and socioeconomically diverse school communities; and developing diverse pipelines of teachers and school leaders. (ed.gov)
Oracle Marketing Cloud has seen demonstrable success in its work with the dating site. (datingadvice.com)