Methodology, just like in science, can be applied to many functions in life. I personally like to create methods for even the most routine tasks that happen during my day.
While it might be embarrassing to say, I even have a method for brushing my teeth. This might sound a bit obsessive but I have found that many things can be accomplished successfully and to the end when a method for the proper function is developed.
If for some reason I had a dental health issue, which I doubt because I have a solid method, then I would be able to explain to my dentist what the issue is and describe exactly how I got about brushing my teeth. The method I have developed allows for consistency and reliability.
These are the same reasons that scientists will use the scientific method to complete research and science experiments. The repetition and precise method removes variables that would otherwise skew results for a given project or experiment.