The phrase "method approach" refers to using a particular way or strategy to achieve a goal or solve a problem. It means following a specific method or system instead of doing something randomly or without a plan. Full definition
A mixed methods approach was adopted for data collection and analysis. (eric.ed.gov)
I bring to the table actual scientific method approach without screaming this is fact. (religion.blogs.cnn.com)
There are many sleep program options and specific sleep training method approaches to choose from in designing an effective sleep training plan. (goodnightsleepsite.com)