What are the strengths and weaknesses of ethnographic research?

Ethnography Research has mainly four limitations. They are:

a) Time Consuming, Ethnography research not only takes more time in data collection,but it also take time to analyze the data and write it.

b) Since it uses Triangulation Method, Data collected needs verification and validation, if the data collected is insufficient then the result can be inconsistent.

c) Generalization: Since Ethnography provides more centralized concept about a particular context, It is difficult to produce a generalize concept of that research.

d) There is no way to check the validity of the researchers conclusion since numerical data are rarely provided.