Methodology is compulsory in research study that involve with the process of design,
application, and analysis. The literature review was conducted to describe the relationship of
sampling area, sample size, and determination of the measurement scale. The sample size can
be determined through formula (or equation). When sample size are applied in sampling area,
probability and non-probability sampling will be involve in determining the quantity and
quality of data collection for research. Random probability sampling is divided into simple
random, systematic, stages random, various stages random, and grouping; while nonprobability
sampling can be divided into chance, aimed, quota, snowball, dimensional, critical cases, and maximum variation. Next, the measurement scale can be determined through
normal, ordinal interval and ratio in questionnaire or interview, which all four scales will be
determine measurements such as Likert scale, Thurstone scale, Guttman scale, and the
difference procedures of Sematics scale in carrying out an analysis research. Therefore, the
sample size and sampling area, and also the choice of measurement scale is important in the
methodology for smoothing and accelerating the process of collecting and gathering data.