Modeling techniques are methods used to create representations of real-world systems or processes. These techniques help in understanding complex phenomena by simplifying them into manageable models. For example, in data science, techniques like linear regression or decision trees are used to predict outcomes based on input data. Another common area where modeling techniques are applied is in engineering. Here, computer-aided design (CAD) software allows engineers to create 3D models of structures or machines, enabling them to visualize and test their designs before actual construction. This approach saves time and resources while improving accuracy and efficiency.