Normally estimates are derived with a 50- 50 confidence.  But  is a fifty-fifty case okay while setting  your goals/targets/specification limits ? People will prefer to have a better confidence while setting their goals. So what should be done.? Some improvements needs to be brought in to the current system . Those improvements needs to be chosen in such a way that it will have a positive impact on the goals.

Now, consider a project scenario. Project A sets their effort estimates as 100 Person Days (PD).  This