There are various means of measuring a researchers’s level of success in their field of expertise. Tallying the number of published papers is certainly one of them. Counting how many times each of those papers has been cited in credible journals is another. The problem with each of these methods is that, if you look at the cumulative totals of published works or citations, neither is really an accurate depiction of the quality of work being done by one individual or group. It was for that reason that the h-index, a formula that takes both of these factors into account, was developed.