One typical case of not asking the end users of a computer project. A consultancy made an order entry system for our company, but didn't bother to see what the order entry clerks thought of it. They just installed it without anyone inside the company testing it. The result? When the clerks tried to use it they had to scroll around the screen and many had to pull away from the screen to read the text. The reason? The staff were using 12" monitors and the programmer who put it together was using a 21" monitor. So when the program was transferred to PCs with smaller monitors, it didn't scale down and appeared 60% larger than it should have been.