What is machine learning and how does it work?

Key Takeaways:

  • Machine learning is a type of AI that learns from data to make smarter predictions.
  • It works in five steps: collect data, prep it, train a model, test it, and deploy.
  • Deep learning is machine learning that excels at messy data like images, audio, and language.
  • Popular uses include catching fraud, spotting anomalies, recommending content, and forecasting demand.
  • In operations, machine learning helps predict issues early, automate responses, and keep services reliable.

What is machine learning?

AI machine learning is a subset of artificial intelligence that enables computer systems to automatically learn, adapt, and improve from experience without being explicitly programmed for every task. Instead of relying on hard-coded rules, machine learning models use algorithms to analyze large amounts of data, identify patterns, and make predictions or decisions based on that information. 

These models improve in accuracy and efficiency with time. This comes from being fed new data, which refines their performance. Industries like finance, healthcare, marketing and entertainment rely on AI for automating repetitive tasks. This can include things like predictive analytics and decision-making that involves heavy data. Using AI in this way helps businesses to forecast future developments and maintain smoother operations day-to-day.

How is machine learning different from deep learning?

AI machine learning involves various algorithms that learn from data, whereas deep learning is a specific area that utilizes multi-layered artificial networks to analyze and understand complex or unstructured data. In traditional machine learning, humans help pick the most critical inputs, also known as feature selection.

On the opposite end, deep learning models figure these features out on their own. That’s why deep learning can be really effective for things like image recognition, understanding language, and translating speech. Basically, all deep learning is a type of machine learning, but not all machine learning uses deep neural networks. For a more detailed explanation and examples, visit our dedicated deep learning page.

How is machine learning different from AI?

Artificial intelligence is a more broadly used term that typically includes reference to AI machines or systems performing tasks. These tasks require human input, such as understanding language, recognizing objects, or making complex decisions (perhaps a math equation).

Machine learning is able to both adapt and evolve as it learns through human interaction and input. Put another way, AI is about creating intelligence and machine learning is a top method for doing it. Let’s dig deeper.

How does machine learning work?

Machine learning models are trained using datasets to identify patterns, uncover relationships, and make predictions or classifications. To get good results, we have to go through several phases to turn the data into something useful, and each one needs to be set up and tweaked just right. Here’s a closer look at the process before diving into machine learning use cases:

Data collection

Good data is the starting point for every machine learning project. Data can come from business processes, system logs, sensors, user interactions, or transaction records. Data may be structured, such as audio, or unstructured, like text. A model’s ability to handle real-world data depends on how much and what kind of data it’s been trained on.

Feature selection and pre-processing

After collecting the data, it needs to be cleaned, standardized, and prepared for analysis. This step involves dealing with missing data, eliminating duplicates, and standardizing variables. Feature selection is about finding the data features that are most helpful in solving the problem. Sometimes, making new features from old ones can improve how well a model works.

Model training

While it’s learning, the algorithm looks at the data to find trends and connections. The approach varies depending on the task: classification, regression, or clustering, each using different methods such as decision trees, support vector machines, or neural networks. It learns by making guesses, seeing if it’s right, and then fixing what it got wrong.

Evaluation and optimization

After training, the model’s performance is tested using separate validation datasets to measure its accuracy, precision, recall, and other key metrics. This helps determine how well the model generalizes to unseen data. If performance isn’t up to par, data scientists continue to work with the model by tuning hyperparameters, balancing the dataset, or experimenting with different algorithms until it’s refined and working as expected.

Deployment and inference

Once the model is operating well, it’s deployed into a production environment where it can process live data and make real-time predictions or automate decisions. During this phase, the model continues to learn and adapt as new data becomes available, helping it stay current with real-time information and maintain high accuracy..

By incorporating machine learning models into AI-driven operational platforms like PagerDuty, we create strong resources for spotting anomalies, forecasting incidents ahead of time, helping save businesses crucial time and resources.

Types of machine learning

Supervised learning

Supervised learning uses labeled data to train models to predict outcomes.

Examples:

  • Fraud detection in financial transactions

  • Predictive patient risk scoring in healthcare

  • Demand forecasting in retail

Unsupervised learning

Unsupervised learning identifies patterns in unlabeled data without explicit outcomes.

Examples:

  • Customer segmentation in retail

  • Anomaly detection in IT infrastructure

  • Clustering sensor data in public sector utilities

Semi-supervised learning

Semi-supervised learning combines small amounts of labeled data with large unlabeled datasets to improve accuracy.

Examples:

  • Document classification in finance

  • Medical image analysis with limited annotated datasets

  • Automated incident categorization in IT operations

Reinforcement learning

Reinforcement learning trains models through trial and error, optimizing actions based on feedback.

Examples:

  • Dynamic resource allocation in AI infrastructure

  • Scheduling optimization in public sector logistics

  • Personalized recommendation systems in retail

Machine learning use cases

Almost every industry relies on AI machine learning these days to make smarter decisions, which allows them to be more efficient. By continuously learning from data, machine learning models adapt quickly and can find and surface insights that traditional analytics might miss. 

Here’s a few machine learning use cases across some top industries:

Finance

Machine learning is key for risk, fraud, and forecasting in the money world. Banks and FinTech companies use machine learning to spot weird spending in real time and catch possible fraud. 

These models surpass traditional scoring methods in assessing creditworthiness, going beyond security. They accomplish this through an evaluation of diverse behavioral and financial factors. Investment firms use machine learning to guess market moves, make smarter trades, and automatically check rules, which means less human work and faster, more accurate results.

Healthcare

Machine learning is transforming healthcare, improving both patient care and operational efficiency. Models can use clinical data, lab findings, and patient histories to forecast potential problems like hospital readmissions or other complications before they happen. Because of this, doctors can act faster and get better results. 

Hospitals also use machine learning to improve staffing, predict patient numbers, and better manage resources such as ICU beds and medical equipment. Research-wise, ML algorithms speed up finding new drugs and improve medical scans, which helps spot stuff like cancer or heart problems faster and more accurately.

Public Sector

Governments and public organizations use machine learning to make infrastructure better, improve services, and keep people safe. Predictive analytics lets us know when roads, bridges, and utilities will need work, allowing agencies to fix things before they get worse. 

Machine learning helps with environmental monitoring by monitoring water use, energy needs, and air quality patterns, thus supporting sustainability and resource efficiency.

AI Infrastructure and Operations

Within the realm of IT and AI infrastructure, machine learning is indispensable for ensuring stability, scalability, and cost efficiency. ML models monitor system performance, detect anomalies, and predict incidents before they disrupt operations. Cloud and AI platform providers use machine learning to automate resource provisioning, balancing workloads dynamically based on demand. 

It minimizes downtime and saves money by using resources in a smart way. Machine learning is key in complicated data setups, helping with fixing issues before they happen, fixing them on their own, and always making things better so digital systems are strong, fast, and most importantly, reliable.

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