A second half 1,2016 questions
Information Engineering has made an A, B, C, D, E, F, G, H eight active composition, the desired number, cost and activity logic duration of activity following table projects, activities shown:
| activity | Duration (unit: days) | The number of required | Expenses (Unit: yuan / person day) | Tight before the event |
|---|---|---|---|---|
| A | 3 | 3 | 100 | - |
| B | 2 | 1 | 200 | A |
| C | 8 | 4 | 400 | A |
| D | 4 | 3 | 100 | B |
| E | 10 | 2 | 200 | C |
| F | 7 | 1 | 200 | C |
| G | 8 | 3 | 300 | D |
| H | 5 | 4 | 200 | E、F、G |
Question 1
Give the critical path and the duration of the project.
答：
由题意知该项目的单代号图如上所示：
关键路径为: ACEH
工期为：3+8+10+5 = 26Question 2
Monitoring data show 14 evening after activity E, G are half finished, F has not yet started, the actual project costs 12,000 yuan.
- 1. Calculate the value of this program into the project (PV) and Earned Value (EV)
- 2, please deviation is determined at this time the cost of the project (CV) and schedule variance (SV), and the implementation cost and schedule.
Note: consistent when solving this problem is generally the default for the day of completion of the activity ratio
答：
1.由题意知，在第14天晚结束时，EG已经完成一半，说明ABCD活动已经完成，FH尚未开始。按计划应该是完成ABCD活动，以及活动G应该完成5/8,E活动应该完成3/10,F活动完成3/7,所以：
PV = A+B+C+D+5G/8+E/10+F/7 = 3*3*100 + 2*1*200 + 8*4*400 + 4*3*100 * (10*2*200)*3/10 + (7*1*200)*3/7 + (8*3*300)*5/8 = 900 + 400 + 12800 + 1200 + 1200 + 600 + 4500 = 21600 元
EV = A+B+C+D +E/2+G/2 = 3*3*100 + 2*1*200 + 8*4*400 + 4*3*100 + (10*2*200)/2 + (8*3*300)/2 = 900 + 400 + 12800 + 1200 + 2000 + 3600 = 20900 元
AC = 12000 元
CV = EV - AC = 20900 - 12000 = 8900
SV = EV - PV = 20900 - 21600 = -700
由于CV > 0 ，说明成本节约 ；
SV < 0 说明进度滞后。
Question 3
If the follow-up will not be adjusted, whether it will affect the project schedule? why?
答：
后续不做调整，即为典型，会对工期产生影响 。
spi = ev/pv = 20900/21600 = 0.968
26/0.968 = 26.87 > 26 ，所以工期延误。
Question 4
- 1. Give the total budget (BAC), still need to be completed to estimate (ETC) and estimate at completion (EAC) value
- 2. predict whether it will exceed the total budget (BAC)? Completion deviation (VAC) is how much?
答：
BAC = A+B+C+D+E+F+G+H = 3*3*100 + 2*1*200 + 8*4*400 + 4*3*100 + 10*2*200 + 7*1*200 + 8*3*300 + 5*4*200 = 900 + 400 + 12800 + 1200 + 4000 + 1400 + 7200 + 4000 = 31900 元
cpi = ev/ac = 20900 / 12000 = 1.742
由于没有采取措施，按典型计算： ETC=(BAC-EV)/CPI = (31900-20900)*12000/20900 = 6315.8
EAC = AC + ETC = 12000 + 6315.8 = 18315.8
VAC = BAC - EAC = 31900 - 18315.8 = 13584.2