Limited by time and place, the information obtained is often more real. lack
Point: it will cost a lot of manpower, material resources and financial resources. (2) telephone
Investigation methods. Advantages: relatively low cost, collected data and information
It is faster, larger in quantity and wider in area, and is not limited by time and place.
Restrict. But it is only suitable for investigating relatively simple information. (3) Meeting adjustment
Inquiry method. Advantages: It can save the cost and time.
More, more efficient, but also inspire and communicate with each other. lack
Point: If you have herd mentality and are greatly influenced, the effect of the investigation will be good or bad.
It has a good relationship with the organizer's organizational ability, professional level and working ability.
Big deal.