<P> There are several phases that can be distinguished, described below . The phases are iterative, in that feedback from later phases may result in additional work in earlier phases . </P> <P> The data is necessary as inputs to the analysis are specified based upon the requirements of those directing the analysis or customers who will use the finished product of the analysis . The general type of entity upon which the data will be collected is referred to as an experimental unit (e.g., a person or population of people). Specific variables regarding a population (e.g., age and income) may be specified and obtained . Data may be numerical or categorical (i.e., a text label for numbers). </P> <P> Data is collected from a variety of sources . The requirements may be communicated by analysts to custodians of the data, such as information technology personnel within an organization . The data may also be collected from sensors in the environment, such as traffic cameras, satellites, recording devices, etc . It may also be obtained through interviews, downloads from online sources, or reading documentation . </P> <P> Data initially obtained must be processed or organised for analysis . For instance, these may involve placing data into rows and columns in a table format (i.e., structured data) for further analysis, such as within a spreadsheet or statistical software . </P>

Common methods of data collection for job analysis
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