parameters to modify on a map well made

[gabrielikkiu]

Hello everyone , as the title suggests I wanted to know what are the parameters or curves, as we call them , to change x to have a map done well and without errors
Question is a bit generic but you can have a precise list of these parameters? Turbo diesel engine

[vwaudiguy]

Way too general of a question. Might want to start by focusing on one particular engine/ system, and asking specific questions.