In this paper, we suggested the property that shows the way to measure the efficiency when cone-ratio weight restrictions are applied under constant returns to scale with one-input, multiple-outputs (or multiple-inputs, one-output) in DEA. Based on the suggested property, we proposed graphical illustration of multiple solution problem with one-input, two-outputs in DEA. Then we showed some characteristics of cone-ratio and Wong and Beasley weight restrictions with an illustrative example.

1. Introduction
 2. The characteristics of cone-ratio weight restrictions in DEA
  2.1 The view focused on weight vectors in CCR model
  2.2 The way of measuring efficiency with cone-ratio weight restrictions in DEA
 3. Graphical illustration on the multiple solution problems in DEA
 4. The characteristics of Wong and Beasley weight restrictions in DEA
 5. Conclusion
 References

• 최성균(한국철도공사 연구원) | Sung-Kyun Choi
• 양재경(전북대학교 산업정보시스템공학과) | Jaekyung Yang