Migration to Drupal Drupal
Migration of Data Data Migration Understanding your data
Migrating your data to a common format
Importing the data
Auditing and testing the results
Understanding your Data Understand the relationships between your data
Database schema
Entity relationship diagram (ERD)
Backup!
Migration to a common format Commonly understandable data between the source and target
XML, CSV, SQL
Process to import where necessary
Importing the data Using information gathered from -  (1)Understanding Your Data
Use the data from - (2) Migrating to a common format
Process the data into database/required format
Auditing and testing the results Review success of import
Test, test, test
Where necessary remove and re-import (utilise backups)
Learn from process to understand source and target

Migration to Drupal