May I know various Stages of a Successful Doctoral Thesis?

Preparing a research proposal. Strictly speaking, your research proposal isn't part of your PhD. ...

Carrying out a literature review. ...

Conducting research and collecting results. ...

Completing an MPhil to PhD upgrade. ...

Producing an original thesis. ...

Writing up your dissertation. ...

Defending your PhD at a viva voce.

Also read:- If X-Rays are safe why do doctors protect themselves from it?