Why ECU Tune or Remap?

During the development of an automobile the manufacturers have to, in many respects, find compromises in terms of fuel efficiency, horsepower output, drivability and these days, the most important issue, exhaust emissions. Factors like fuel quality, ambient temperature, air quality, maintenance, operational circumstances etc. as well as financial aspects i.e., insurance classifications, have to be taken under consideration. The manufacturers have to assure operational reliability for the final product worldwide, which means, that in most cases the actual engine potential is not reached.