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Case Study

Call Center Relapses

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Overview

We’ve built a technical call relapses prediction system for one of the major telecommunication companies in Iberia. Currently, 30% of customer calls generated a relapse (a new call that normally escalated the complaint) and hit rate was low. These customers were at a higher risk of churning as they were already having a lot of issues with their service and the company’s proactivity was the only measure that could improve customer satisfaction.

Challenge

Problem

Approach

The project aimed to predict call center relapses by giving priority to customers that were at a higher risk of churning due to lower satisfaction with the company. We’ve included granular data from past interactions with the customer, while also taking into account service level and product information.

Boosting Model

Our gradient boost model was able to predict call center relapses until a satisfactory Precision @ K metric. From our classification model, our customer could now select the top customers with higher likelihood of relapsing and contact them proactively, decreasing churn.

Machine Learning Model

Time Line

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Feature Engineering

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Baseline model

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Deployment

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Improvements

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Key Insights

Using Precision for this problem was the right decision. The customer had a limited bandwith of pro-actively calling customer, so precision @ K enabled us to target the most relevant customers.

We’ve used a gradient boosting model that incorporates service level and customer interactions to predict relapses.

Most Data Science problems are technically simple. The hard part is to find the right metric to optimize. This should always be done with business users input.