If a task takes several days to complete, you can enter the amount of time spent on it each day.
If several people are working on a task, each of them can log his or her hours.
Each entry can be followed up with a comment, explaining exactly what the time has been spent on.
To see the time log for a particular task, click on the "hours spent" field 1 and choose "Full time log
for this task" 2. Alternatively, you can do it from time log
reports.