Hello Payal,
My exposure to word 'Roll-out' project says it is the extension of existing implementation to other units of the company. Then often the masterdata upload sequence comes into question. For this you have good information in this thread.Master data upload sequence in sap pm
Other useful links:
Steps in roll out project process
SAP Implementation Project, Rollout Project, Supporting Project, Upgrading Project
Roll out project details | SCN
KJogeswaraRao