Answer:
1b)
The advantages of observation is simple and straightforward, and it is very inexpensive; by using the method of observation, we only need to provide investigators to the store from the observation to directly collect the performance of the store staff and the actual behavior of interacting with customers. Gather information about the store environment and the performance of employees from observations, or the needs of customers. For example, the staff has to take care of the customers in the store while taking online orders, the time needed to prepare food or drinks, the length of time customers stay in the store, the queue for drinks, the waiting time, etc. Sometimes, the staff or customers in the store may not be aware that some details have occurred, for the survey is a very important phenomenon, which can only be obtained with the help of observation method for more accurate results. This may provide a good idea for training programs such as simulations, case studies, or even action learning.
Conversely, the disadvantage of observation is usually that the human factor is not included, and it is also difficult to interpret all the details and results of observation, while observation requires a skilled observer to be competent, and during observation, the behavior of employees may be affected by being observed. Furthermore, Observer often chooses to observe something different, resulting in errors. Different observers' observations of the same event are included in the observation record and some observers are not included in the observation record.