Poor Business Cases

The good thing is that most now have a BC and can spell Cost / Benefit, etc. The bad thing is that these analyzes are often created as a 'fill in the blanks "where the numbers just inserted witout any brain activity. So we get nice and positive analysis and we get ok on our projects.
Now it's just that it's hard to be pessimistic about the costs and it's hard not to be optimistic on sales / revenues. Therefore, these curves always like this:

- And therefore all Business Cases look too good. Remember that it is the one who creates the curves, which is responsible - it's not the decision maker. The decision-maker is however liable to fire you because of insanity!