Dear Prashant, I think that methodology is a theoretical analysis of the appropriate method you plan to use to reach your aim, in the other words you can tell that methodology is a strategies. Method is specific protocol you plan to use in your research, ea. rather tactics. Tool, However, you can consider as specific method or even device you can use in your research.
Method is a heading as there are different methods for any particular experiment or product development or manufacturing. Methodology is in detail procedure describing how to do the experiment or development or manufacturing. Technique is the technology involved in the experiment or product development.
Method is a way of doing / way to do a particular thing, while methodology is a systemic path used in attending to a given thing and technique is the skill involved in getting the result of a peculiar thing.