Methods and Approaches

A. Cost-observed analysis
B. Cost-calculated analysis
C. Cost-minus analysis
D. Cost-benefit analysis

A. Norm-referenced measurements
B. Logical-referenced measurements
C. Attitude-referenced measurement
D. Enquiry-referenced measurement

A. Psychological
B. Technological
C. Logical
D. Strong

A. Feedback
B. Statistical
C. Strategic
D. Strong

A. the case study
B. experimentation
C. random sampling
D. naturalistic observation