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【一造每日真题】08.25 |造价管理:方案比选(寿命期不同互斥方案)

【一造每日真题】08.25 |造价管理:方案比选(寿命期不同互斥方案)

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搜索优化标题备选:

  1. 一造寿命期不同互斥方案怎么选?净年值 / 最小公倍数法真题训练
  2. 一级造价师|寿命期不同互斥方案比选,高频考点 + 历年真题解析

摘要:寿命期不同互斥方案两大核心方法:净年值 NAV、最小公倍数法,考场分清适用条件。

考点精讲

寿命期不同的互斥方案,不能直接用净现值比选,计算期不一样,口径不统一。 两种主流方法:

  1. 净年值法(NAV)—— 优先选用
    公式:净年值 = 净现值 × 资金回收系数 (A/P,i₀,n) 判别:净年值≥0,选最大者;最为常用,不用统一计算期。
  2. 最小公倍数法(重复方案法)
    取各方案寿命期最小公倍数作为共同计算期,假设方案重复实施,再算净现值比选。 ⚠️缺点:当寿命期相差很大,公倍数巨大,计算繁琐。
  3. 研究期法:选取一个共同研究期限,一般取最短寿命期。

速记口诀:期不同,别比 NPV;优先 NAV,次选公倍数

易混提示

  1. ❌误区:寿命期不同互斥方案,直接对比净现值 NPV,直接错误。
  2. ✅净年值法:不管寿命长短,直接比每年等额收益,结论可靠,考试考得最多。
  3. 最小公倍数法前提:方案可以重复原样实施;技术更新迭代场景不适用。
  4. 互斥方案比选,基准收益率 i₀必须相同。

典型习题(2020‑2025 真题汇编)

单选 1(2021 真题)

对于寿命期不同的互斥方案进行经济比选时,宜采用的方法是() A. 净现值法 B. 净年值法 C. 增量内部收益率法 D. 投资回收期法

答案:B

解析:寿命不同互斥方案,优先净年值法。净现值只适合寿命相同;增量内部收益率多用于寿命相同互斥方案;回收期只判断回收快慢,不能用于方案择优。

单选 2(2023 真题)

两个互斥方案,甲寿命 4 年,乙寿命 6 年,基准收益率 10%,下列说法正确的是() A. 可直接比较两方案净现值 B. 采用最小公倍数法,共同计算期 12 年 C. 不能使用净年值法 D. 采用内部收益率直接择优

答案:B

解析:4 和 6 最小公倍数 12 年。寿命不同不可直接比 NPV;净年值恰恰是首选;内部收益率不能直接用于互斥方案择优。

单选 3(2022 真题)

某互斥项目 A 寿命 3 年,B 寿命 5 年,基准收益率 8%,采用净年值计算,A 的 NAV=120 万,B 的 NAV=145 万,则() A. 选 A B. 选 B C.AB 均可 D. 无法判断

答案:B

解析:净年值越大越优,145>120,选 B。

多选 1(2024 真题)

寿命期不等的互斥投资方案比选,可采用的方法有() A. 净年值法 B. 最小公倍数法 C. 研究期法 D. 净现值直接比较法 E. 静态投资回收期法

答案:ABC

解析:净年值、最小公倍数、研究期,三者均可处理寿命不等互斥方案;寿命不等不能直接 NPV 对比;静态回收期只评价回收快慢,不做互斥择优。

多选 2(2020 真题)

关于互斥方案经济评价,下列说法正确的有() A. 寿命相同互斥方案,可用净现值择优 B. 寿命不同互斥方案优先净年值 C. 最小公倍数法假设方案可以重复实施 D. 净年值小于 0 的方案也可以选择 E. 增量 IRR 可直接用于寿命不同方案

答案:ABC

解析:NAV<0 方案不可行;增量内部收益率适合寿命期相同互斥方案。

案例小计算(案例分析高频改编)

背景:甲乙两个互斥方案,基准收益率 i=10% 甲:初始投资 1000 万,寿命 4 年,每年净收益 400 万; 乙:初始投资 1500 万,寿命 6 年,每年净收益 450 万。 已知 (A/P,10%,4)=0.31547;(A/P,10%,6)=0.22961

要求:用净年值法判断应选择哪个方案。

解:甲净年值 NAV 甲 =‑1000×(A/P,10%,4)+400 =‑1000×0.31547+400 =84.53 万元

乙净年值 NAV 乙 =‑1500×(A/P,10%,6)+450 =‑1500×0.22961+450 =105.59 万元

NAV 乙>NAV 甲,且均大于 0,选择乙方案

阅卷采分点:①写出净年值公式;②代入资金回收系数;③对比大小得出结论。

考场避雷清单

1. 看到 “寿命期不同互斥方案” 第一反应:禁止直接对比净现值。 2. 考试做题,优先净年值法,计算量更小。 3. 最小公倍数法要看清寿命数字,不要算错公倍数。 4. 净年值为负,方案本身不可行,直接淘汰,不要参与比选。

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  1. CONNECT:[ UseTime:0.001156s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001612s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000660s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000706s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001287s ]
  6. SELECT * FROM `set` [ RunTime:0.000487s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001326s ]
  8. SELECT * FROM `article` WHERE `id` = 964963 LIMIT 1 [ RunTime:0.001133s ]
  9. UPDATE `article` SET `lasttime` = 1787619057 WHERE `id` = 964963 [ RunTime:0.027584s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000738s ]
  11. SELECT * FROM `article` WHERE `id` < 964963 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001100s ]
  12. SELECT * FROM `article` WHERE `id` > 964963 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001019s ]
  13. SELECT * FROM `article` WHERE `id` < 964963 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002786s ]
  14. SELECT * FROM `article` WHERE `id` < 964963 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001935s ]
  15. SELECT * FROM `article` WHERE `id` < 964963 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003553s ]
0.252721s