A health information systems company plans to design, market, and implement an information system that caters specifically to nephrology practices and interfaces with dialysis clinics, so that the physician's role in patient care can be proactive across the care continuum. Activities and their optimistic, pessimistic, and most likely activity durations in hours are shown in Table below. Optimistic Most Likely Pessimistic Activity Predecessor Activity Time Time Time A 65 157.5 250 B A 590 940 1290 C A 690 990 1290 D A 390 590 790 A. 190 390 590 F A. 8 29 50 A. 590 740 890 H A 1090 1690 2290 A 390 590 790 190 390 590 K B 2090 3690 5290 L K 1090 3190 5290 M I 390 590 790 190 340 490 590 50 N 390 790 C,D,E,F,G,H,L,M,0 40 60 L,P 60 150 240 a) Calculate the mean duration for each activity. b) Calculate the variance for each activity time. c) Draw the activity on node diagram.

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A health information systems company plans to design, market, and implement an
information system that caters specifically to nephrology practices and interfaces with dialysis
clinics, so that the physician's role in patient care can be proactive across the care continuum.
Activities and their optimistic, pessimistic, and most likely activity durations in hours are shown
in Table below.
Optimistic
Most Likely
Pessimistic
Activity
Predecessor Activity
Time
Time
Time
A.
65
157.5
250
B
А
590
940
1290
A
690
990
1290
D
A
390
590
790
E
А
190
390
590
F
А
8
29
50
G
A.
590
740
890
H
А
1090
1690
2290
I
A
390
590
790
J
A
190
390
590
K
B
2090
3690
5290
L
K
1090
3190
5290
M
I
390
590
790
N
J
190
340
490
N
390
590
790
C,D,E,F,G,H,L,M,0
40
50
60
L,P
60
150
240
a) Calculate the mean duration for each activity.
b) Calculate the variance for each activity time.
c) Draw the activity on node diagram.
Transcribed Image Text:A health information systems company plans to design, market, and implement an information system that caters specifically to nephrology practices and interfaces with dialysis clinics, so that the physician's role in patient care can be proactive across the care continuum. Activities and their optimistic, pessimistic, and most likely activity durations in hours are shown in Table below. Optimistic Most Likely Pessimistic Activity Predecessor Activity Time Time Time A. 65 157.5 250 B А 590 940 1290 A 690 990 1290 D A 390 590 790 E А 190 390 590 F А 8 29 50 G A. 590 740 890 H А 1090 1690 2290 I A 390 590 790 J A 190 390 590 K B 2090 3690 5290 L K 1090 3190 5290 M I 390 590 790 N J 190 340 490 N 390 590 790 C,D,E,F,G,H,L,M,0 40 50 60 L,P 60 150 240 a) Calculate the mean duration for each activity. b) Calculate the variance for each activity time. c) Draw the activity on node diagram.
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