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【一造每日真题|08.15】互斥方案经济效果评价专项|2020-2025 历年带完整解析

【一造每日真题|08.15】互斥方案经济效果评价专项|2020-2025 历年带完整解析
点击上方价木兰投资经→ 右上角 “...” →设为星标
适配科目:造价管理、案例分析考点定位:互斥方案比选核心指标(NPV、NAV、IRR、增量内部收益率);寿命相同 / 寿命不同方案选用方法,管理高频选择题,案例方案优选大题必考基础。

一、考点精讲

1. 核心指标适用规则

1)净现值(NPV)

基准收益率ic;NPV≥0,方案可行;

寿命期相同互斥方案:直接比较净现值,NPV 越大方案越优。

2)净年值(NAV)(NAV=NPV(A/P,ic,n))

寿命不等互斥方案首选方法;无需统一计算期;

NAV≥0可行,净年值越大方案越好。

3)内部收益率 IRR

⚠️重点警示:不能直接用各方案 IRR 大小比选互斥方案!

互斥方案必须采用增量内部收益率 ΔIRR

4)增量内部收益率 ΔIRR

判别准则:ΔIRR>ic:投资额大的方案更优;ΔIRR<ic:投资额小的方案更优。

2. 方案选取总结

✅寿命相同互斥方案:NPV / ΔIRR 均可
✅寿命不同互斥方案:优先NAV(净年值);也可用最小公倍数法统一计算期后 NPV
❌禁止直接对比 IRR 大小选择互斥方案

二、易混提示

❌误区 1:互斥方案直接选择内部收益率 IRR 最高方案✅正解:独立方案可用 IRR 判断可行与否;互斥方案不能直接比 IRR。
❌误区 2:计算期不一致方案,直接对比净现值 NPV✅正解:NPV 依托相同计算周期;寿命不等直接对比 NPV 结论无效。
❌误区 3:ΔIRR 大于 0 就选择投资大方案✅正解:对比基准收益率ic,不是和 0 对比。
❌误区 4:净年值 NAV 小于 0 方案依旧可以选用✅正解:NAV<0,方案本身不具备经济可行性,直接淘汰。

三、典型习题

单选 1(2023 真题)

对于计算期不等的互斥投资方案,最适宜采用的评价指标是()
A. 净现值B. 净年值C. 内部收益率D. 总投资收益率
答案:B
解析:净年值无需统一计算期,是寿命不同互斥方案首选指标。

单选 2(2022 真题改编)

两个投资额不同、计算期相同的互斥方案,采用增量内部收益率 ΔIRR 比选,基准收益率ic=10%,若 ΔIRR=12%,则()
A. 投资额小的方案最优B. 投资额大的方案最优C. 两个方案经济效果一致D. 无法判定优劣
答案:B
解析:ΔIRR>基准收益率,增量投资收益达标,选择投资额更高方案。

单选 3(2021 真题)

关于互斥方案经济评价,说法正确的是()
A. 直接选取 IRR 数值最大的互斥方案B. 计算期不同互斥方案可直接比较净现值C. 净年值法适用于寿命不等互斥方案优选D.ΔIRR 小于 0 时选择投资额大方案
答案:C
解析:A 错误,互斥方案不能直接比 IRR;B 错误;D 规则相反。

单选 4(拔高改编)

现有两个计算期相同互斥方案,基准收益率 8%。甲方案 NPV=260 万元,乙方案 NPV=190 万元,则()
A. 优先选择甲方案B. 优先选择乙方案C. 还需对比内部收益率D. 需计算增量内部收益率判断
答案:A
解析:寿命一致互斥方案,NPV≥0 前提下,净现值越大方案越优。

多选 1(2024 真题多选)

下列关于互斥投资方案评价,正确的有()A. 计算期相同可采用净现值法比选B. 计算期不同优先使用净年值法C. 不能直接使用内部收益率高低优选互斥方案D. 增量内部收益率大于基准收益率,优选投资较小方案E. 净年值小于 0 的方案应当舍弃
答案:ABCE
解析:D 错误;ΔIRR>ic优选投资额大方案。

多选 2

属于互斥方案常用比选方法的有()
A. 净现值法(相同寿命)B. 净年值法C. 增量内部收益率法D. 直接比较内部收益率E. 最小公倍数法统一计算期后净现值
答案:ABCE

案例计算题 1(基础题型)

基准收益率ic=6%,两个寿命相同互斥方案:
方案 A:初始投资 1200 万元,运营期净收益现值合计 1450 万元;
方案 B:初始投资 1600 万元,运营期净收益现值合计 1920 万元。
要求:采用净现值法选出最优方案。
解答
NPV (A)=1450−1200=250 万元NPV (B)=1920−1600=320 万元NPV (B)>NPV (A)>0,选择方案 B。

案例计算题 2(综合拔高题型)

基准收益率i_c=5%,两个互斥方案:
方案 1:寿命 4 年,净现值 NPV₁=360 万元;
方案 2:寿命 6 年,净现值 NPV₂=440 万元;
已知\((A/P,5\%,4)=0.2820\),\((A/P,5\%,6)=0.1970\)要求:采用净年值法比选最优方案。
解答
NAV₁=360×0.2820=101.52 万元NAV₂=440×0.1970=86.68 万元NAV₁>NAV₂>0,选择方案 1。

四、考场避雷总结

先审题区分:独立方案 OR 互斥方案,二者评价规则完全不同;

看清方案寿命期:相同寿命可用 NPV;寿命不同优先 NAV;

重中之重:互斥方案严禁依靠 IRR 大小直接比选,属于每年高频错题;

ΔIRR 对比对象是基准收益率\(i_c\),不是 0;

任何方案,NPV<0、NAV<0 直接判定不可行,不予考虑。

互动寄语

互斥方案评价是造价管理必考计算选择题,也是案例设备更新、方案比选大题的核心考点。牢牢记住 IRR 使用限制,分清 NPV 与 NAV 适用场景,避开命题人常设陷阱。
核心框架:

成本视角看投资,稳健才是硬道理。

成本是价值的锚,估值是艺术的秤。

最好的投资,是投资自己,知识最抗通胀。

关注「造价木兰投资经」,

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  1. CONNECT:[ UseTime:0.000795s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002071s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.032028s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.022124s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001541s ]
  6. SELECT * FROM `set` [ RunTime:0.032876s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001580s ]
  8. SELECT * FROM `article` WHERE `id` = 936223 LIMIT 1 [ RunTime:0.041710s ]
  9. UPDATE `article` SET `lasttime` = 1786784979 WHERE `id` = 936223 [ RunTime:0.101078s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.046229s ]
  11. SELECT * FROM `article` WHERE `id` < 936223 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.041838s ]
  12. SELECT * FROM `article` WHERE `id` > 936223 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007073s ]
  13. SELECT * FROM `article` WHERE `id` < 936223 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.023802s ]
  14. SELECT * FROM `article` WHERE `id` < 936223 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.020006s ]
  15. SELECT * FROM `article` WHERE `id` < 936223 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.069142s ]
0.632545s