Actually I wanted the resource start date & end date directly so that when i
traverse the resource.timescale(start date, end date,,,,) the loop will be
shortel if I directly get the resource start date and end date.
Otherwise I have to loop through all the resource assignments and then get
the resource start date and end date which will increase the processing time.
Also I cannot give project start date and end date because the resource might
have started work before that and anyway the loop would be very long.