Possible applications of the big five personality traits testing in human resource departments I am a multimedia artist who is interning in a human resources department of a casino resort. In the department we have daily meetings to discuss updates to both the orientation and the performance of the casino's employees.

During the discussion I had an idea on maybe using psychometric ( big 5 ) testing for either helping in filtering out unfit candidates for certain positions or/and allocation of time or resources to certain to certain people or group's of people to help them in certain ways or identify problems as to improve the effectiveness of the staff.

My questions are;

1: Can it be used in this way, or what other ways can HR use it?

2: How to go about using it?

3: Will it be effective?

4: Does there exists other companies that use psychometric testing or big 5 for there employees?
Personality testing of (potential) employees is big business, according to the BBC:


  A 2014 survey of global HR professionals by CEB, one of the largest providers of online talent tests, indicated that 62% of respondents used some sort of personality test pre-hire. Thirty percent indicated that personality assessments would be used to identify high potential talent in the future. By contrast, a 2001 survey of managers from the American Management Association found that 29% of employers used a psychological measurement or assessment.


Supposedly up to 10 years ago, personality testing was mostly used to improve employee retention, rather than predict performance:


  The most prevalent reason given for using personality testing was their contribution to improving employee
  fit and reducing turnover by rates as much as 20% (Geller, 2004), 30% (Berta, 2005), 40% (Daniel, 2005), and even
  70% (Wagner, 2000). It is of considerable interest that evidence for the validity of personality tests for predicting job
  performance is rarely cited (see Hoel (2004) for a notable exception) by human resource professionals or recruiters.


The BBC cites some anecdotal evidence that personality testing is increasingly being used to predict performance as well.

And it does have some scientific basis. Restricting discussion to Big 5 main factors, from a 2017 review:


  
  Conscientiousness is the best personality predictor of job performance and
  counterproductive behaviors, and it has shown validity generalization across samples,
  occupations, and countries. Operational validity of conscientiousness was found to be .39
  when a quasi-ipsative forced-choice format was used (Salgado, Anderson, &amp; Tauriz, 2015;
  Salgado &amp; Tauriz, 2014); 
  Emotional stability [the opposite of neuroticism] was the second most relevant personality
  predictor of job performance and counterproductive work behaviors, 
  Conscientiousness, emotional stability, and agreeableness are the most valid predictors
  of overall counterproductive behaviors, interpersonally oriented counterproductive
  behaviors, and organizationally oriented counterproductive behaviors (Berry et al.,
  2007); 
  Conscientiousness, emotional stability, and agreeableness showed incremental
  validity over GCA [general cognitive ability = IQ] for predicting overall job performance (Salgado &amp; De Fruyt, 2006); 
  The format of the personality inventory is an important moderator of the criterion-related
  validity of the Big Five dimensions, so that the validity increases dramatically when quasi-ipsative
  forced-choice formats are used (Salgado, Anderson, &amp; Tauriz, 2015; Salgado &amp;
  Tauriz, 2014);
  
  
  
  
  [...]
  
  


But sure there are plenty of management/HR fads out there as well in field of personality testing. A widely cited review of Hunter and Schmidt from two decades ago put the validity of personality testing (without much discrimination how it was done) to 0.22, in the context of hiring practices as predictors for job performance.