As a CFO for Air Canada, please write a memo to the investors/shareholders meeting respectively to address the following questions.

Given our goals of firm value and shareholder wealth maximization, we have stressed the importance of NPV. And yet, many of the financial decision-makers at some of the most prominent firms in the world continue to use less desirable measures such as the payback period and AAR, in addition to the NPV and IRR. As the CFO of Air Canada, Why do you think this is the case?