What characteristic allows engineers to create complex designs with additive manufacturing?

The layer-by-layer construction characteristic of additive manufacturing is a crucial factor that enables engineers to create complex designs. This method involves building parts one thin layer at a time, which allows for greater freedom in design compared to traditional manufacturing techniques. With additive manufacturing, intricate geometries, complex internal structures, and customized shapes can be produced without the constraints often imposed by subtractive methods, which typically require specific tooling and setups that can limit design options.

This layer-by-layer approach also permits the use of advanced materials and techniques, such as support structures that can be easily integrated and removed, further expanding the range of designs that can be successfully fabricated. As a result, engineers can innovate and optimize designs for performance and efficiency, pushing the boundaries of what is possible in manufacturing.