The data that can be collected in a certain area means that the government has dominance over the area. The more data that can be collected, the more the central government can grasp the local situation and thus strengthen management. Data is so important that for a long time in history, the task of statistics has been vested in the government, the military, and the intelligence agencies. The first survey company in my country was established in the early 1990s at the strong request of Procter & Gamble.
These problems have led to the data collection mobile number list in the questionnaire era, which can only be sampled, not full collection. Therefore, special sampling theories and methods are derived. But no matter how the data method is improved, in business, sampling is always an insurmountable obstacle. Decision makers always feel that.
The first step in the transformation of data from small to large begins with system acquisition. For example, if an enterprise expands its scale and wants to build chain stores in various places, the first step is to install POS machines, collect transaction data, and replace paper order forms/deliveries. At this time, if you want to know the sales data, you can view it based on the data collected by the POS machine (as shown in the figure below).