The diesel electric locomotive being built by GE Transportation, now a Wabtec company, is perhaps the most complex piece of equipment that is being designed out of India, after the light combat aircraft.
A typical loco has roughly around 300,000 parts starting from the giant engines to radiators, not to mention the complex electronic units. All these have to be fitted into a truck (structure) which is all but 21.28 metres long, 3.2 metres wide, and 4.2 metres high.
The locomotive design needs a significant amount of customisation to meet the specifications given by the client, in this case the Indian Railways.