Different Methods require different amount of time + Having access to resources can be a major factor
Requirement of Funding Bodies
Research institute, businesses and other organisation are able to provide funding for the research, but may ask for it be conducted in a specific form.
Personal Skills + Characteristic
Each sociologists provides different personal skill sets and this may affect their ability to use different methods
Subject Matter
It may be much harder to study a particular group or subject by one method than by another
Research Opportunity
An unexpected opportunity to carry out a research may appear; may not be able to use a structured methods
