How Science Works

The Scientific Method is traditionally presented in the first chapter of sciencetextbooks as a simple recipe for performing scientific investigations. Though many useful points are embodied in this method, it can easily be misinterpreted as linear and "cookbook": pull a problem off the shelf, throw in an observation, mix in a few questions, sprinkle on a hypothesis, put the whole mixture into a 350° experiment — and voila, 50 minutes later you'll be pulling a conclusion out of the oven! That might work if science were like Hamburger Helper®, but science is complex and cannot be reduced to a single, prepackaged recipe.

http://undsci.berkeley.edu/article/howscienceworks_01