Thanx! Very helpful answer!!

Hi
I'm applying for an environmental policy PhD, and have to write a 3-4 page research proposal. Among others, I have to specify a projected timetable for the research. How do I approach this?
One piece of advice I got was put down 1st year for literature review and complete research proposal. But that is pretty general and also leaves 2 more unspecified years... hmm.. ideas anyone?