Investment Appraisal for Cambridge A-Level Business | 剑桥 A-Level 商务投资评估

📚 Investment Appraisal for Cambridge A-Level Business | 剑桥 A-Level 商务投资评估

Investment appraisal is the process by which a business evaluates whether a capital project or investment is worth undertaking. It combines quantitative techniques, such as payback period, average rate of return and net present value, with qualitative judgement about risk, strategy and external factors.

投资评估是企业判断一个资本项目或投资是否值得实施的过程。它结合了定量方法——如投资回收期、平均收益率和净现值——以及对风险、战略和外部因素的定性判断。

At Cambridge A-Level Business, you need to understand why firms carry out investment appraisal, how to calculate the three main methods, and how to interpret the results in a real business context. This article covers the essential knowledge, worked examples, common errors and exam technique.

在剑桥 A-Level 商务课程中，你需要理解企业为什么要进行投资评估，如何计算三种主要方法，以及如何在真实的商业情境中解释结果。本文涵盖核心知识、计算示例、常见错误和考试技巧。

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1. The purpose and context of investment appraisal | 投资评估的目的与背景

Firms invest in fixed assets, new technology, new outlets, research or product development. However, capital is scarce, so managers must choose between competing projects and ensure that funds are not wasted on projects that fail to add value.

企业会投资于固定资产、新技术、新门店、研发或产品开发。然而，资本是稀缺的，管理者必须在竞争性项目之间做出选择，并确保资金不会被浪费在无法增加价值的项目上。

Investment appraisal provides a consistent framework for comparing projects. It helps answer questions such as: How quickly will the initial cost be recovered? What average return will the project earn? Does the project increase the value of the business after allowing for the time value of money?

投资评估为比较项目提供了一致的框架。它有助于回答以下问题：初始成本多久能收回？项目平均能获得多少回报？在考虑货币时间价值后，项目是否增加了企业价值？

Quantitative techniques should not be used in isolation. A project that appears strong on paper may still be rejected because of strategic fit, risk, ethical concerns or lack of management experience.

定量方法不应单独使用。一个在纸面上看起来很有利的项目，仍可能因为战略匹配度、风险、道德顾虑或管理层缺乏经验而被拒绝。

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2. Key cash flow principles | 关键现金流原则

Investment appraisal is based on net cash flow, not accounting profit. Net cash flow is the difference between cash inflows and cash outflows in a given year. Depreciation is a non-cash expense and should be excluded unless a question specifically asks for profit-based information.

投资评估以净现金流为基础，而不是会计利润。净现金流是某一年现金流入与现金流出的差额。折旧是非现金费用，应排除在外，除非题目特别要求基于利润的信息。

The initial investment is recorded as a negative cash flow at Year 0. Future net cash inflows are recorded at the end of each year unless the question states otherwise. It is important to show the Year 0 outflow clearly in any table or calculation.

初始投资在“第 0 年”记录为负现金流。未来的净现金流入通常记录在每年年末，除非题目另有说明。在任何表格或计算中，都应清楚地展示第 0 年的现金流出。

For example, if a machine costs $120,000 and is expected to generate annual cash savings of $35,000 for five years, the Year 0 cash flow is −$120,000 and Years 1 to 5 are +$35,000 each. The machine’s scrap value, if any, is added as a cash inflow in the final year.

例如，如果一台机器成本为 120,000 美元，预计五年内每年产生 35,000 美元的现金节省，则第 0 年现金流为 −120,000 美元，第 1 至第 5 年每年为 +35,000 美元。如果机器有残值，则应在最后一年作为现金流入加上。

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3. Payback period | 投资回收期法

The payback period is the length of time it takes for an investment to recover its initial cost from net cash inflows. It is popular because it is simple to calculate and focuses on liquidity and risk: the faster the payback, the sooner the firm gets its money back.

投资回收期是指一项投资从净现金流入中收回初始成本所需的时间。它很受欢迎，因为计算简单，并且关注流动性和风险：回收越快，企业越早收回资金。

When annual net cash flows are constant, payback period = initial investment ÷ annual net cash flow. For example, if a project costs $80,000 and generates $20,000 each year, payback is $80,000 ÷ $20,000 = 4 years.

当年净现金流保持不变时，回收期 = 初始投资 ÷ 年净现金流。例如，一个项目成本为 80,000 美元，每年产生 20,000 美元，回收期为 80,000 ÷ 20,000 = 4 年。

Payback period = Initial investment ÷ Annual net cash flow

When cash flows are uneven, add net cash flows year by year until the cumulative total equals the initial outlay. If payback occurs during a year, assume cash flows arise evenly throughout that year.

当现金流不均衡时，逐年累加净现金流，直到累计总额等于初始投资。如果回收发生在某一年内，通常假设现金流在该年内均匀产生。

The payback method ignores cash flows after the payback point and ignores the time value of money. It should therefore be used alongside other methods for major strategic decisions.

该方法忽略了回收期之后的现金流，也忽略了货币的时间价值。因此，对于重大战略决策，它应与其他方法一起使用。

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4. Worked example: payback period | 回收期计算示例

A project requires an initial investment of $200,000. Forecast net cash inflows are $60,000 in Year 1, $80,000 in Year 2, $70,000 in Year 3, and $50,000 in Year 4.

一个项目需要初始投资 200,000 美元。预计净现金流入为：第 1 年 60,000 美元，第 2 年 80,000 美元，第 3 年 70,000 美元，第 4 年 50,000 美元。

Year	Net cash inflow ($)	Cumulative cash flow ($)
0	(200,000)	(200,000)
1	60,000	(140,000)
2	80,000	(60,000)
3	70,000	10,000

The cumulative cash flow turns positive during Year 3. At the end of Year 2, $60,000 is still outstanding; Year 3 generates $70,000. Payback = 2 + (60,000 ÷ 70,000) = 2.86 years, or about 2 years 10 months.

累计现金流在第 3 年变为正值。第 2 年末仍未收回 60,000 美元；第 3 年产生 70,000 美元。回收期 = 2 + (60,000 ÷ 70,000) = 2.86 年，约为 2 年 10 个月。

If the firm has a target payback period of 3 years, this project would be accepted on that criterion. However, payback

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