Data Mapping
To allow data conversion programs to be written, clear and definitive rules must be devised to:
match the data held on the old system(s) with the new, whether in the same format or a different one
translate information currently held electronically into new data and
define the ways that information not currently held electronically should be entered and validated.
This key implementation task is known as Data Mapping. Time and resources must be allocated for understanding and documenting the formats of data items in both the old and new systems and the validation rules governing the input of data when planning data mapping activities.
