Methodological (adjective)

1. Relating to the methods or techniques used in a particular field or activity.
2. Relating to the systematic study of methods and principles of a discipline.

Origin:

Late 19th century: from method + -logical.

Examples:

1. The study employed a rigorous methodological approach.
2. The research paper had a methodological flaw that invalidated the conclusions.
3. The methodological approach used in the study was not suitable for the research question.
4. The course covered the methodological foundations of the field.
5. The methodological guidelines were followed strictly throughout the experiment.