Reverse engineering is a method for creating computerized three-dimensional data from physical models or products. It is a efficient process, and when coupled with other time saving technologies, such as rapid prototyping, can offer clear advantages for a company.

The engineering analysis process consists of two phases:

1. 3D laser scanning or measurement of components.
2. Building of a 3D model of the item, based on the scanned data.

Surfaces defined using the 3D scanning data are processed and converted into a solid model, which is then imported into a .STL file. The .STL file contains standard input data, which can be used for any rapid prototyping process. After the .STL file has been transferred to a computer for rapid prototyping you can make unlimited models of the scanned object. Sometimes reverse engineering is the only way to reconstruct a unique product when the design documentation is missing.