Question

The City Commission of Nashville has decided to build a botanical garden and picnic area in the heart of the city for the recreation of its citizens. The precedence table for all the activities required to construct this area successfully is as follows: Ś Time (hrs) Immediate Predecessor(s) ó 20 None ó 65 105 Code Description Find location; determine resource requirements B Requisition of lumber and sand Dig and grade Saw lumber into appropriate sizes Position lumber in correct locations Nail lumber together Put sand in and under the equipment H Put dirt around the equipment Put grass all over the garden, landscape, paint D C ó - IT MUO I - GH o 20 40 60 80 100 120 140 160 180 200 Refer to the legend for the activity that corresponds to each code. Using the line drawing tool, draw a Gantt chart for activities E through I of the project.

Answer 1

ACTIVITY	DURATION	ES	EF	LS	LF	SLACK	CRITICAL
A	20	0	20	0	20	20 - 20 = 0	YES
B	65	20	85	30	95	95 - 85 = 10
C	105	20	125	20	125	125 - 125 = 0	YES
D	30	85	115	95	125	125 - 115 = 10
E	15	125	140	125	140	140 - 140 = 0	YES
F	10	140	150	140	150	150 - 150 = 0	YES
G	20	150	170	150	170	170 - 170 = 0	YES
H	15	150	165	155	170	170 - 165 = 5
I	30	170	200	170	200	200 - 200 = 0	YES

ES = MAX(EF OF ALL PREDECESSORS); 0 FOR FIRST ACTIVITY

EF = ES + DURATION

LF = MIN(LS OF ALL SUCCESSOR ACTIVITIES); MAX EF AS LF FOR LAST ACTIVITY

LS = LF - DURATION

SLACK = LF- EF

CRITICAL PATH = LONGEST PATH WITH 0 SLACK:

CRITICAL PATH = A---C---E---F---G---I

DURATION OF PROJECT = 200

GANTT CHART 0 0 105 0 m 15 ACTIVITY 10 T 20 15 - I 30 50 100 150 200

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