Initial Setting Time:-
It is regarded as the time elapsed between the moment that the water is added to cement to the time that the paste starts losing its plasticity.
Water added 
85 % of P = 0.85;
Plunger 1 mm sq. plunger (Vicat’s apparatus)
Minimum time 30 mins.
Final Setting Time:-
It is defined as the time elapsed between from adding water to the time that the paste completely looses its plasticity.
Plunger 1 mm circular Plunger.
Maximum time 10 hrs.