Feasible Identification of practical limits before studying. Early detection of problems in the study design.
Adequate number of subjects
- Comprehensive and detailed theory frame work but impractical
- Over sampling
- Estimation of sample size in order to answer to your questions.
- Realistic estimate of number of subjects likely to be available.
Adequate technical expertise
- skills, equipment and experience --->recruitment, measurement, data management, and data analyses
Affordable in time and money
Manageable in scope
- too ambitious, too many measurements, too large sample size, and too many questions