I see. But still, why do some firms only read the application if you pass the test, rather than do what many others do and make it part of the same first stage, or invite someone to do the test if the application is successful.
I'm sure there's a justification for it, but it's extremely frustrating to spend hours on an application for it not to be even read!
Put frankly, they haven't got the time or resource to read every application in the timeframes required. I regularly used to read about 6-8
MILLION words of applications each recruitment cycle, and have to mark and assess each form. That is crazy intense and so sometimes you have to make decisions to make the process efficient rather than thorough. If you choose thoroughness over efficiency, there is a risk you lose candidates to your competitors who have a quicker recruitment process than you.
On the flip side, why many firms will screen applications first before inviting them to the online assessment is predominately down to cost. These tests aren't cheap! And so if you can ensure you cut out everyone is clearly isn't going to be suitable first (e.g. not eligible, doesn't meet minimum criteria, has a really bad application form), you will save the firm a fair bit of money.
I wouldn't assume that because firms screen applications first and then invite people to test that the system is fairer. I have seen this in practice, and have seen some exceptionally questionable approaches to cut the numbers down before testing.