What two simple rules should be followed when choosing a project selection approach?

What will be an ideal response?

First and foremost, objectivity and consistency in selection method is paramount. Achieving both objectivity and consistency allows a firm to avoid the pitfall of tweaking results and starting projects that are personal favorites but don't merit pursuit. Second, a wide variety of selection methods may be appropriate for specific companies and project circumstances. As with most things, over-reliance on one end of a scale, whether it is financial, quantitative, or any other, is not the best approach. A broad algorithm that embraces both financial and non-financial considerations is often best.