For an activity, ‘optimistic time duration’ is 4 days,

For an activity, ‘optimistic time duration’ is 4 days, ‘pessimistic time duration’ is 11 days and ‘mostlikely time duration’ is 8 days. The PERT value of time duration is______ days (up to one decimal place).

7.8 to 7.9
PERT value of time duration/Expected time (te)

=	(t₀ + 4t_m + t₀)
	6

Where, t_o = Optimistic time, t_m = Most likely time, t_p = Pessimistic time.

Thus, (te) =	(t₀ + 4t_m + t₀)
	6

=	{(4 + (4 × 8) + 11}	= 7.83 days.
	6