Competition is often presented in a free market. Efficiency evaluation of decision-making units (DMUs) needs accommodation of such competition among various units due to constrained resources. This paper develops an innovative quantitative approach to address the above-mentioned performance evaluation problem with constrained resource using output-oriented DEA. The proposed model allows DMUs to identify the maximum input reduction and resource savings to achieve performance improvement. Relations between the proposed model and classical output-oriented DEA models are explored and some economic insights are derived from these models. The proposed approach is validated by use of computational examples.