阅读下列说明，回答问题1至问题4，将解答填入答题纸的对应栏内。【说明】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见下表。
【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14天晚的监控数据显示活动E、G均完成一半，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）请判断次时项目的成本偏差（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】关键路径ACEH，工期26天。【问题2】（1）PV=A+B+C+D+3/10E+3/7F+5/8G=900+400+12800+1200+3×2×200+3×1×200+5×3×300=21600EV=A+B+C+D+1/2E+1/2G=900+400+12800+1200+2000+3600=20900（2）SV=EV-PV=20900-21600=-700＜0，进度落后。CV=EV-AC=20900-12000=8900>0，成本节约。【问题3】会对工期产生影响。因为，截止到目前SPI=EV/PV=20900/21600=0.97＜1，并且F工作尚未开始，如果不作调整，会改变关键路径，造成工期延长。【问题4】（1）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=31900 因为不对后续工作进行调整，所以是典型偏差，ETC=(BAC-EV)/CPI=6321.84 EAC=ETC+AC=18321.84（2）不会超出总预算 VAC= BAC-EAC=13578.16
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