If you are a brand ice cream manufacturer, what kind of observation data should you collect?

Natural observation: observing customers' reactions and behaviors in real life.

Planned observation: the researcher artificially sets the observation environment.

Camouflaged observation: the interviewee didn't know that he was being observed. The main advantage is that respondents will not change their behavior because of observing technology, which is more real.

Non-disguised observation: Respondents know that they are being observed. The main advantage is that richer data can be collected, such as additional data about the characteristics of respondents (such as demographic data, purchasing habits and other data can be obtained by asking later)

Direct observation: direct observation of actual phenomena or behaviors.

Indirect observation: examining the results of phenomena or behaviors, such as observing some hidden or past behaviors. It mainly includes archival records and physical traces.

Work observation: manual observation, without the help of other equipment.