Hello,

Forward engineering is the process of building from a high-level model or concept to build in complexities and lower-level details. Generally, it is important in IT because it represents the 'normal' development process. For example, building from a model into an implementation language .

Now come to the reverse engineering process it is a  process of recovering the design, requirement specifications and functions of a product from an analysis of its code. It builds a program database and generates information from this. For example,  its  involves San Jose-based Phoenix Technologies Ltd., which in the mid-1980s wanted to produce a BIOS for PCs that would be compatible with the IBM PC's proprietary BIOS.

All the best.