Dear member,
Conducting recruitment tests related to the job is a good hiring practice. Nevertheless, if the candidates get filtered out in the recruitment tests, then it shows that the candidates were not worthy. Your concern is that administering the recruitment tests is a time-consuming activity. If the candidate fails, then it wastes your, as well as the recruitment agency's, time.
Against this backdrop, the following questions arise: what kind of tests are these? Are these aptitude tests or tests related to the work? If the latter, then nothing is wrong if the candidates are filtered out. It is a common practice in each industry.
While academic scores may not show the candidate's real talent, can the recruitment tests be related to any academic subject? If yes, then you may set a minimum mark scored in that subject. It could be ≥ 65% or even more.
If the candidates are failing in aptitude tests, then fix the minimum academic score for graduation at ≥ 65%.
I have seen in the recruitment of IT companies, engineering candidates failing in the aptitude tests. But then it is common. Out of 10, barely one candidate reaches the level. Possibly, with this method, the recruitment may become costly, but the cost of a wrong hire is far greater than the cost of the recruitment.
Thanks,
Dinesh Divekar