Conversion Steps
In general data conversion effort in the cloud is divided into the following steps:
Prepare for conversion
Create conversion data files
Upload conversion data files to the cloud
Process conversion data files
Process converted data in cloud application
Approve converted data for production mode
Note: 
It is important to note that the conversion process is a highly iterative process. All the steps above are likely to be done (completely or partially) multiple times during the conversion process.
For example, customer typically start with a small set of data to convert, they fix issues discovered with that data and then re-create new data files and proceed to convert them. This can happen many times, each time with either a different data sample or bigger and bigger data conversion sets until all the required data has gone through the conversion process.