As an in-house recruiter, you want the successful candidate to be a good match to the role profile and up to the job-challenges but, more than that, the hiring line manager will want them to be a good fit. Surveys have regularly indicated that previous hires proved to be sub-optimal in 60% or more of cases and that same basic problem has been endemic for decades.
More information: http://theundercoverrecruiter.com/recruitment-chemistry-alchemy/