| Survey cycle | Twice a year | Once a year | Twice a year |
| Survey target | Construction workers | Software engineers assigned to software projects (Basis: Article 38 of the Enforcement Decree of the Software Industry Promotion Act) | Workers in small and medium-sized manufacturing industries |
| Survey content | Actual wages by occupation in the construction industry | Applied labor rate standards, Wage trend | Wages by occupation type in small and medium-sized manufacturing Industries |
| Survey form | Company status, Type of company, Wage status, Wage trend, etc. | Company status, employee status, Software engineer salary, Wage trend. etc. | Basic information about the company, Wages for each job of blue-collar workers |
| Survey method | Mail survey, Online survey, On-site investigation by surveyors | Mail survey, On-site investigation by surveyors | Fax survey, Mail survey, On-site investigation by surveyors |
| Sampling method | Quota sampling for considering region and contract amount | Stratified sampling | Stratified Systematic sampling |
| Population | Construction workers currently working on construction sites at the time of the survey (target population) | Out of a total of 15,293 companies in the entire population, companies that can represent the characteristics of the population were selected as the sample. | Small and Medium-sized Manufacturing Enterprises are classified under the Korean Standard Industrial Classification (KSIC) |
| Alternative methods for non-response | - | - | Weighting adjustment, Post-stratification |
| Computing method | Wages for each job type | - | Standard error computing method, Variance estimation and coefficient of variation computing method |
| Outlier authentication algorithm | IQR | Review the data that has increased or decreased by more than 10% compared to the previous year | Data that responded more than double the average or less than 0.7 times the average. |
| Handling outliers | Weight decay | Reconfirm respondents | Modify |