What HR would like to do is to find proven competence required for the job, and to also ensure that the candidate would be ready to pick up on new skills, as the role and demands of the organisation keep changing. This is easier said than done.
To find the best person out of available candidates, if not the right person, assessments need to be redesigned for the digital age worker.
The best way to predict a person’s fit to doing a job well, is to do just that: to give a sample of the work to be done, and to checkout the performance. This exercise is not a perfect predictor either, and nor can it be done for all types of jobs. However "work sample tests" need to be designed, requiring similar cognitive and creative abilities as the tasks in a given role. The assessment must be capable of being administered remotely as necessary.
Organisations that manages to have an internally validated repertoire of assessments will certainly have a competitive advantage over time. Google is known to give its interviewers standard guides of interview questions based on years of number crunching of finding out the best predictors from in-house data. However, assessments predicting success for one organisation do not translate into success for another. Organisations would have to do their own number crunching on what would work for them, and this would have to be a continuous improvement process.
Of course that is easier said than done. One place companies could look at for best practices in online assessments is the massive online open course offerings like Coursera, Udacity and edX. They have not only reinvented education but also changed online assessments to improve candidate engagement, and speed and efficacy of assessment. For online large scale assessments, HR could use some of the features found in these organisations. For example, why not have more online and transparent peer-to-peer assessments, by current employees, as in the MOOCs? Why not weave some of these practices of online education communities, into the selection process within corporates?
(1) http://link.springer.com/article/10.1007%2FBF00983503#page-1 accessed June 1st, 2016.