In this post, you will learn about some popular and most common real-life examples of machine learning classification problems. For beginner data scientists, these examples will prove to be helpful to gain perspectives on real-world problems which can be termed as machine learning classification problems. This post will be updated from time-to-time to include interesting real-life examples which can be solved by training machine learning classification models.
Before going ahead and looking into examples, let’s understand a little about what is machine learning (ML) classification problem. You may as well skip this section if you are familiar with the definition of machine learning classification problems & solutions.
You may want to check out my post on what is machine learning to get a better understanding of machine learning concepts with the help of examples.
What are ML Classification Problems?
Machine learning classification problems are those which require the given data set to be classified in two or more categories. For example, whether a person is suffering from a disease X (answer in Yes or No) can be termed as a classification problem.
Classification problems can be of the following different types:
- Binary classification – Classifies data into two classes such as Yes / No, good / bad, high / low, suffers from a particular disease or not etc
- Multinomial classification: Classifies data into three or more classes; Document classification, product catgeorization, malware classification
Classification problems are supervised learning problems wherein the training data set consists of data related to independent variables and response variables (label). The classification models are trained using some of the following algorithms:
- Logistic regression
- Decision trees
- Random forest
- Light GBM
- Voting classifiers
- Artificial neural networks
Classification Problems Real-world Examples
Here is the list of real-life examples of machine learning classification problems:
- Customer behavior prediction: Customers can be classified into different categories based on their buying patterns, web store browsing patterns etc. For example, classification models can be used to determine whether a customer is likely to purchase more items or not. If the classification model predicts a greater likelihood that they are about to make more purchases, then you might want to send them promotional offers and discounts accordingly. Or if it has been determined that they will probably fall off of their purchasing habits soon, maybe save them for later by making their information readily available.
- Document classification: A multinomial classification model can be trained to classify documents in different categories.
- Image classification: A multinomial classification model can be trained to classify images into different categories. For example, in order to classify images of dogs and cats for use within machine vision systems, machine learning techniques can help automate this process based on pre-classified images of dogs and cats.rent categories
- Web text classification: Classifies web text or assign tag to web text based on pre-determined categories learned from the past data. For example, classification models can be used to automatically classify web text into one of the following categories: Sports, Entertainment, or Technology.
- Ad click-through rate prediction: Binary classification models can be used to predict whether one or more ads on the website will be clicked or not. Such models are used to optimize the ad inventory on websites by selecting which ads will have a better chance of being clicked. A machine learning classification model can be built using historical data about what types of users do or don’t click on certain ads, along with information like demographics and content within each web page where an ad appears; then it is used to predict the chances that a user will click on an ad.
- Product categorization: A multinomial classification can be used to categorize the products sold by different retailers in the same categories irrespective of categories assigned to the product by the respective retailers. This use case is relevant for eCommerce aggregators. Read this page on product categorization for greater details.
- Malware classification: A multinomial classification can be used to classify the new/emerging malwares on the basis of comparable features of similar malware. Malware classification is very useful for security experts to take appropriate actions for combating/preventing malware. Machine learning classification algorithms such as Naïve Bayes, k-NN and tree-based models can be used for malware classification.
- Image sentiment analysis: Machine learning binary classification models can be built based on machine learning algorithms to classify whether the image contains a positive or negative emotion/sentiment or not. This use case is relevant in the field of social media analytics where machine learning techniques are applied to understand users’ opinions and sentiments on different topics.
- Customer churn prediction: A binary classification model can be used to classify whether a customer will churn or not in the near future. The application of the customer churn classification model can be found in different business scenarios like up-selling/cross-selling to existing customers, identifying at-risk accounts in the customer base, etc. More commonly, telecommunications companies have been found to use machine learning classification models for churn prediction.
- Customer behavior assessment for promotional offers: A binary classification model can be used to classify whether an account is customer-friendly or not in the context of a specific business scenario like upselling, cross-selling etc. For example, based on past data about how customers respond to certain types of offers; machine learning techniques can be used to predict whether a given customer will respond positively or negatively to the offer.
- Anomaly detection problems such as fraud detection: Anomaly detection models can be built using machine learning classification algorithms like Naïve Bayes, k-NN etc. The application of these machine learning anomaly detection models is very wide and includes use cases such as finding unusual patterns in financial transactions that may indicate fraud, finding machine problems by detecting unusual machine readings, and monitoring machine parameters to detect abnormalities.
- Credit card fraud detection: A binary classification model can be used for credit card fraud detection where the historical transactions data of a customer is analyzed using machine learning algorithms like Naïve Bayes, k-NN etc. Based on past fraudulent or non-fraudulent transaction data and machine learning classification models, it can be predicted whether the given credit card will result in fraudulent transactions or not. Read more about credit card fraud detection and machine learning.
- Deduction validation classification: A binary classification model can be used to classify whether a deduction claimed by the buyer on a given invoice is a valid or invalid deduction. This would be useful in account receivables to classify whether the given invoice will be paid in full or partial based on deduction validation classification. Read more about account receivables and machine learning use cases.
- Credit-worthiness assessment: A machine learning classification model can be trained to predict the probability of default for a customer based on past transaction data and historical information about customers who have defaulted/not defaulted in their payments. Credit card companies, financial institutions like banks, etc
- Blocked order release recommendation: A binary classification model can be built to classify whether an order placed by the customer should be blocked or not based on the buyer credit exposure. This use case is very prevalent in account receivables where machine learning classification models are used to predict whether a given order should be blocked or not. This would help the business save costs by identifying high-risk customers.
- Sentiment analysis: A machine learning binary classification model can be trained to identify the sentiment (positive/negative) of a given text document based on classification algorithms like Naïve Bayes, SVM etc. This would help determine whether the sentiment expressed in a document such as an email is positive or negative for business purposes like identifying whether a customer is satisfied or dissatisfied with the service provided.
Machine learning classification models can be used to solve a wide variety of business problems. There are many machine learning algorithms that can be applied in order to help you classify different types of documents, images and even customer behavior for promotional offers or up-selling/cross-selling opportunities. For example, machine intelligence could detect fraud by looking at unusual patterns in financial transactions which may indicate fraudulent activity. Machine intelligence is also widely implemented within the telecommunications industry where machine learning classification models have been found to predict churn rate with more accuracy than traditional methods based on historical data from past customers. In summary, machine learning classification algorithms / models are an extremely powerful tool that has vast applications across industries and use cases such as credit card fraud detection or document classification (e.g., categorizing a given image as a dog or cat) to machine learning classification models that help classify customer behavior for up-selling/cross-selling.