Different types of research designs have different advantages and disadvantages.
The design is the structure of any scientific work. It gives direction and systematizes the research.
The method you choose will affect your results and how you conclude the findings. Most scientists are interested in getting reliable observations that can help the understanding of a phenomenon.
There are two main approaches to a research problem:
Experiment Resources (2008). Types of Research Designs. Retrieved [Date of Retrieval] from Experiment Resources: http://www.experiment-resources.com/research-designs.html