Difference between conversion/Migration and interface

Frequency

• Conversions/Migration are a one time event
• interfaces are ongoing

Occurrence in the project timeline

• conversions/Migration executed before production
• interfaces executed during production

Manner of execution

• Conversions/Migration are batch
• Interfaces may be batch or real time

Complexity

• Conversion/Migration does have very complex, it’s totally depends upon the data mapping activity.
• Coordinating with other systems make interfaces more complex

Maintenance

• Maintenance of interface is bit cost intensive task.