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Critical Path Method

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Critical Path Method Activity on Node Activity on Node ... – PowerPoint PPT presentation

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Title: Critical Path Method


1
??????????????? Critical Path Method ??? Activity
on Node
2
Activity on Node
- ????????????????????????????????????????????????
??????????????????????????????????????????????
Node (Activity on Node - AON) ????????????????????
??? Precedence Diagram - ?????????????????????????
???? AOA ??????????????????????????????
????????????????????????? Dummy Activity ????????
?????????????????? ????? ?????????????????????
Node ?????????????????????????? - AON
????????????????????????????????????????????????
Node ???????????????????????????????????????????
?????????????????????????????????????? ???????????
3
CPM ??? AON
  • ???????? CPM ?????? Activity on Node (AON)
    ????????????????????? Node ??????????
    ?????????????????????????

4
CPM ??? AON
  • ???????????? ???????????????? Dummy Activity

30
D
B
A
F
10
20
50
60
C
E
40
5
CPM ??? AON
  • ????????????????? Node

6
Activity Table
  • ????????

7
CPM ??? AON
  • Forward Calculation

8
AOA
  • AOA

D, 5
B,5
12
2
7
17
30
12,
2,
21,
0,
18,
F, 3
18
A, 2
21
0
2
20
60
50
10
12,
18
C, 10
E, 6
2
12
12
40
9
AON
  • ?????????????

10
AOA
  • ????????????? AOA

12,13
D, 5
B,5
7
17
12
30
2
8
18
13
13
2,2
21,21
0,0
18,18
F, 3
A, 2
21
20
60
0
2
18
50
10
0
18
21
2
12,12
E, 6
C, 10
18
40
2
12
12
18
2
12
12
11
AON
  • Critical Path, Total Float ??? Free Float

12
AOA
  • AOA

12,13
D, 5
B,5
7
17
12
30
2
8
6,5
18
13
13
1,1
2,2
21,21
0,0
18,18
F, 3
A, 2
21
0
2
18
20
60
50
10
0
0,0
21
18
2
0,0
12,12
E, 6
C, 10
18
40
2
12
12
18
12
2
12
0,0
0,0
13
PERT Program Evaluation and Review Technique
14
PERT
  • ???????????????????????????? 1950s ??? U.S.
    Navys Polaris Missile Program
  • ?????????????????????????????????????????????????
    ?????????? ???????? ??????????????????????????
    ?????? 3 ??????
  • te (a 4m b)/6

15
PERT
  • te ??????????? (Expected Time) ??????????????
  • a Optimistic ??????????
  • m Most likely time ??????????
  • b Pessimistic time ??????????
  • te (a 4m b)/6

16
PERT
  • ???????????????????????
  • ??????????????
  • ???????????????????????????????????
  • ?????????????????????????????????????????????????
    ?????????????????? Ts ???????

17
Normal Distribution Curve
18
???????????????
  • ????????????????????????
  • ???????????????????????????????????????????????
    (???????????????????????????????????????)
  • ????????????????????????????????????
  • ??????????????????????????????? ????????
  • ??????????????????????????????????????????????????
    ?????
  • ??????????????????????????????????????????????????
    ???

19
EXAMPLE
2.54
20
EXAMPLE
  • ????????????????????????????????? 31 ???????
  • (31-30.67)/2.54
  • 0.13 ???????????? Z
  • Prob ?????? 55
  • - ????????????????????????????????? ?? 35 ???????
  • (35-30.67)/2.54
  • 1.70 ???????????? Z
  • Prob ?????? 95

21
EXAMPLE
  • ??????????????????????????????? 28 ???????
  • (28-30.67)/2.54
  • -1.05 ???????????? Z
  • Prob ?????? 15
  • ?????????????????????? 70 ??????????????????????
  • ???????????? Z 0.52
  • Ts (0.522.54)30.67 32 ???????
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