Based on the value of CCi , S2 > S4 > S3 >S1.
Sine all the suppliers S1, S2 ,S3 and S4 belong to Class III, so they can be recommended with low risk. Management of the company can select supplier S2 followed by supplier S4. The ranking order of supplier is S2 > S4 > S3 >S1 and management can take decision accordingly