Explanation: One common problem with costperhire metrics is that they omit costs that are not related to specific candidates. The costperhire measure is determined by dividing total costs by number of hires. It is important that the costs and hires be taken from the same time interval. To be comprehensive, a costperhire measure should include the salaries of those employed to make hires, the cost of advertising, and any other administrative costs incurred during the hiring process.