8. Discount rate and Net Present Value Discount Rate Net Present Value IR +ve IR -ve PW -ve PW +ve Internal Rate of Return 0 Petroleum Project Appraisal and Screening Week 4
9. Internal Rate of Return IR +ve = Interest rate with positive present worth IR -ve = Interest rate with negative present worth PW +ve = Positive present worth PW -ve = Negative present worth Petroleum Project Appraisal and Screening Week 4