Dear Marry,
As per my knowledge and worked on positive time management I got below difference point's
Positive time:
1. 0050 & 2011 Info type's will be maintained due to capture the time events.
2. In info type 0007 time management status should be 1 actual times.
3. TM00 schema will be used.
4. Time evaluation PT60 every day has to be run by back ground job.
Negative time management:
1. In time management status 9
2. Info type 2002 will be updated
3. No need to run time evaluation every day
4. TM04 schema will be used.
Common points for Positive & Negative time:
1. Quota configuration is same.
2. Info type 0007 configuration is same.
Ur's Mohan