PERT - Google Sheets

	A	B	C	D	E	F	G
1	Activity	Predecessors	Duration (in days)
2	Activity	Predecessors	tO	tP	tM	tE	tE = (t0 + 4*tM + tP) / 6.
3	A	-	4	3	1	1,833333333
4	B	A	2	0	0	0,3333333333
5	C	A, B	1	0	0	0,1666666667
6	D	C	0	0	0	0
7	E	B, C	0	0	0	0
8	F	d	0	0	0	0
9	G	e	0	0	0	0
10	H	-	0	0	0	0
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