One of managements' primary concerns is the return rate (as percentage of volume) associated with the Zinsser machine. What would be the NPV if the return rate remained at 1.5% instead of dropping to 1%? As part of the risk management process, management is concerned with realistic "worst-case" scenarios. in particular, at what return rate would the project break even? One of managements' primary concerns is the return rate (as percentage of volume) associated with the Zinsser machine. What would be the NPV if the return rate remained at 1.5% instead of dropping to 1%? As part of the risk management process, management is concerned with realistic "worst-case" scenarios. in particular, at what return rate would the project break even