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A Machine Learning & NLP Based Credit Scoring System

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Our Client

  • We created this system for an African-based SMB that provides small loans to mostly the people without banks. The company asked for a simple streamlining system for loan approvals based on the data source that is more credible than the credit bureau’s data. This streamlined system allowed them to expand their business without worrying about the credibility of loan approval.

Problem Statement

  • Creating a robust credit scoring system with the help of Machine Learning (ML) and Natural Language Processing (NLP) to help SMBs like our client as well as the financial institutions to process loans in real-time without much of a hassle and with minimum default rate.
  • The most challenging part of this project was to find a reliable data source for the client that is better than Credit Bureau’s data. The second challenge we faced was defining the set of parameters for calculating the credit score in the system.

Our Solution

  • Developing a data source and introducing Machine Learning and Natural Language Processing to automate the generation of credit scores.
  • The basic solution to what they needed was to build a data source that is not available on any traditional channel like Credit Bureau. So, we built a system on the basis of mobile device data which included extraction of data like income, investments, expenses, type of mobile devices, installed apps, etc with the help of NLP. This information accumulated by the NLP is then passed to the credit score system where the parameters were set. Due to the high volume of the data, this process did not work for long. To resolve this issue we introduced Machine Learning to automate the generation of credit scores.

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Business Impact

Here is how we implemented the plan we had for the company. We created this system in 4 steps –
  • Data collection from mobile devices: We fetched the information from the mobile SMS data of the customer using mobile SDK after getting the consent of the customer. After fetching the information, we stored the data on the server database of the system.
  • Data Warehousing: After collecting data, we then stored the data into a common data warehouse that was built for the system. After the successful warehousing, the data then gets transformed in the way so that the NLP engine can pass it to the credit scoring engine.
  • NLP engine implementation to fetch the information from the data: This is the engine designed to read the raw SMS data being collected from the customer’s mobile devices and fetching the desired information like expenses, income, investments, and more depicting the financial strength of the customer.
  • Credit score engine installation: After this, the information including the financial strength and the type of device, contact list, and more are fed to the ML-based credit score engine. At first, this system was created on a rule-based algorithm in which the data gets weighed and is tagged to different data points. Once we had enough data points, the algorithm was upgraded and was trained to calculate credit scores automatically.

Conclusion

As per the requirement of the client, they needed a system to calculate the credit score on the basis of a more reliable data source than Credit Bureau Data. For this, we designed an efficient system that collected the data from customers’ mobile devices and calculated the credit score on the basis of that. This entire process helped them speed up the process of client conversion.

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