Perficient believes that these non-GAAP financial measures are useful to investors because they provide investors with a better understanding of Perficient's past financial performance and future results. Perficient's management uses these non-GAAP financial measures when it internally evaluates the performance of Perficient's business and makes operating decisions, including internal operating budgeting, performance measurement, and the calculation of bonuses and discretionary compensation. Management excludes stock-based compensation related to restricted stock awards, the amortization of intangible assets, amortization of debt issuance costs related to convertible senior notes, acquisition costs, adjustments to the fair value of contingent consideration, net other income and expense, the impact of other infrequent or unusual transactions, and income tax effects of the foregoing, when making operational decisions.