There are many reasons that customers will pay their bills late.
Some fraudulent behaviors may cause heavy short-term losses to providers.
We thus expect that the system can analyze and predict user behavior through a small amount of CDR.
Based on the studied experiences of the past three months and users who made habitual late payments, we also found that fraudulent behavior could be identified based on the behavioral difference between the current week and past weeks, and between the current week and the past several months.
To prevent special fraudulent behavior from being diluted by other behavior, the training data from each month was
subdivided into different datasets for one week, two weeks, three weeks and one month.
Ten datasets in total were then generated,including four, three, two, and one datasets, which were generated for one week, two weeks, three weeks, and one month, respectively.
Thus, a stable model that is easily converted with time was established, and the effectiveness of the data mining effect
was increased.