A group of managers were given the assignment to measure the height of a flagpole. So they get their ladders and tape measures and go out to the flagpole. Attempting to measure this flagpole was turning out to be a much more difficult task than any of them had imagined; what with them falling off the ladders, dropping the tape measures and so on, the whole thing had just turned into a total mess.
After a while, an engineer happens along and sees what they are attempting to do. She walks over, pulls the flagpole out of the ground, and lays it flat on the ground. She measures it from end to end, gives the measurement to one of the managers and walks away without saying a word.
After the engineer has gone, one manager turns to another and laughs as he's shaking his head. "Now that's just like an engineer! We're looking for the height and she gives us the length!"