On the basis of the target of your study you have to decide which are the interesting aspects, properties or attributes that you will have to note and record for each of the cases.
Many kinds of information are difficult to obtain through structured data collection instruments, particularly on sensitive topics such as domestic violence or income.
Many groups such as sex workers, drug users, illegal immigrants, squatters and ethnic minorities are always difficult to reach, but the problems are often greater for QUANT data collection methods. Self-reported information obtained from questionnaires may be inaccurate or incomplete.
There is often no information on contextual factors to help interpret the results or to explain variations in behavior between households with similar economic and demographic characteristics. The administration of a structured questionnaire creates an unnatural situation that may alienate respondents.
Studies are expensive and time-consuming, and even the preliminary results are usually not available for a long period of time. Research methods are inflexible because the instruments cannot be modified once the study begins.
Reduction of data to numbers results in lost information. The correlations produced e. Untested variables may account for program impacts. Errors in the hypotheses tested may yield misimpressions of program quality or influential factors.
Errors in the selection of procedures for determining statistical significance can result in erroneous findings regarding impact.The strengths of case study methodology The case study offers a rich method for investigating and researching a single case.
The effectiveness of the approach being researched can be verified by replication of outcomes across similar cases. has specifically discussed the strength of using case studies for theory-building. For Stiles. Therefore a comparative study of schools curriculum reform in China is most meaningful, on the one hand, to facilitate better understanding of the largest education system in the world and its system wide reform in context of drastic and profound.
A case study is a research method that relies on a single case rather than a population or sample. When researchers focus on a single case, they can make detailed observations over a long period of time, something that cannot be done with large samples without costing a lot of money.
Strengths. Weaknesses. Study findings can be generalized to the population about which information is required. Samples of individuals, communities, or organizations can be selected to ensure that the results will be representative of the population studied.
Thiele, L.: Multiobjective Evolutionary Algorithms: A Comparative Case Study and the Strength Pareto October · IEEE Transactions on Evolutionary Computation Evolutionary algorithms (EAs) are often wellsuited for optimization problems involving several, often conflicting objectives. The comparative method is often used in the early stages of the development of a branch of science.
It can help the researcher to ascend from the initial level of exploratory case studies to a more advanced level of general theoretical models, invariances, such as causality or evolution.