A lack of cooperation from villagers in the area, the questionnaire and the information is stored, and often takes a long time to collect the information, there are problems with a little research.
The lack of cooperation from residents in the area must be surveyed and collected data often takes a long time to collect information, thus making the process a little research.
The lack of cooperation by the villagers in the responses to the data collection and often long and spend the time in data collection the bit between operations research.