Information gathering is a technique or mechanism for collecting a large data for data analysis.
Questionnaires are paper documents with a well-thought list of questions meant for a large group of people to answer individually. They are faster and cheaper to implement.
Document analysis requires for an acquired document to be assessed or graded for analysis. Interviews are established between the information seeker and individuals directly. Observation is a long process of monitoring a sampled group for data collection. The JAD is a more complicated and effective way of data collection, it requires collection of data from different perspectives and locations. It is time consuming and expensive.
