Step 1.	Determine average annual projected losses of an uncontrolled DED outbreak.
Step 2.	Determine projected tree losses under the various levels of control.
Step 3.	Determine the net number of trees saved by implementing a control program for each control alternative and assign a value to these benefits (benefit or value data used here will be that presented in Table 1).
Step 4.	Determine the costs of operating various alternative control programs, including no control (cost data used here will be that presented in Table 2).
Step 5.	Calculate net benefits and benefit cost ratios for each alternative.