已知某信息工程由A、B、C、D、E、F、G、H八个活动构成。项目的活动历时、活动所需人数、费用及活动逻辑关系如下表所示:
【问题1】(4分)
请给出该项目的关键路径和工期。
【问题2】(12分)
第1 4天晚的监控数据显示活动E、G均完成了一半,F尚未开始,项目实际成本支出为12000元。
(1)请计算此时项目的计划值(PV)和挣值(EV)。
(2)请判断此时项目的成本偏差(CV)和进度偏差(SV),以及成本和进度执行情况。
【问题3】(3分)
若后续不作调整,项目工期是否有影响?为什么?
【问题4】(6分)
(1)请给出总预算(BAC)、完工尚需估算(ETC)和完工估算(EAC)的值。
(2)请预测是否会超出总预算(BAC)完工偏差(VAC)是多少?
正确答案及解析
正确答案
解析
【问题1】(4分)
关键路径ACEH
工期=3+8+10+5=26天
【问题2】(12分)
(1)
PV=A+B+C+D+3/10×E+3/7×F+5/8×G=900+400+12800+1200+3×2×200+1×3×200+5×3×300=21600
EV=A+B+C+D+0.5E+0.5G=900+400+12800+1200+2000+3600=20900
(2)
SV=EV-PV=20900-21600=-700<0 所以进度落后
CV=EV-AC=20900-12000=8900>0 所以成本节约
【问题3】(3分)
没有影响。(1 分)
原因:G虽然拖延了1天,但G有4天的自由时差可以利用(1分):F虽然滞后了3天,但F有3天的自由时差可以利用。(1分)
【问题4】(6分)
(1)BAC=A+B+C+D+E+F+G+H=31900
ETC=BAC-EV=11000
EAC=ETC+AC=11000+12000=23000
(2)不会超出总预算(BAC)
完工偏差VAC=BAC-EAC=8900
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