Interview-to-Offer Ratio

Sourcing effectiveness is measured at the channel level rather than the campaign level: not whether this job posting on this board worked, but whether this board consistently produces candidates who advance through screening and hire at a rate that justifies the cost. Channel effectiveness analysis requires minimum 6 months of data to reach statistical reliability for most sourcing channels, and minimum 12 months for channels with lower volume. The most common mistake is making sourcing channel decisions based on cost per application rather than cost per qualified application or cost per hire, which systematically undervalues high-quality channels that produce fewer but better candidates and overvalues cheap channels that produce volume without quality.