Grand Canyon University Selection Method in Business Discussion

I’m working on a nursing discussion question and need an explanation and answer to help me learn.

 Assume that you were rejected for a position you applied to, based on their selection methods used. In general, discuss both the reliability and validity as they relate to recruitment and selection practices. Why are both factors critical when considering which selection method to use in making hiring decisions? Lastly, critically evaluate both the reliability and the validity of your firm’s current recruitment and selection process.