📚 Worksheet Answers – Chapter 9: Operations Strategy | 第9章练习题答案：运营策略
This article provides detailed model answers for the Chapter 9 worksheet, covering key topics in operations strategy such as lean production, quality management, Just-in-Time, and productivity. Each question is paired with a clear explanation to support your revision for the Cambridge A-Level Business syllabus.
本文为第9章练习题提供详细的模范答案，涵盖精益生产、质量管理、准时制生产及生产力等运营策略的关键主题。每道题目均配有清晰的解析，助你高效备考剑桥A-Level商务课程。
1. What is Lean Production? | 什么是精益生产？
Question: Define lean production and identify the three core principles that underpin this approach to operations management.
问题：定义精益生产，并指出支撑这种运营管理方法的三个核心原则。
Answer: Lean production is an operations philosophy that concentrates on eliminating all forms of waste while delivering maximum value to the customer. The first core principle is waste elimination ('muda'), targeting seven types of inefficiency. The second principle is continuous improvement ('kaizen'), where small, incremental changes are made by all employees on a daily basis. The third principle is respect for people ('respect for humanity'), which involves empowering workers and encouraging teamwork to solve problems at the source.
答案：精益生产是一种运营理念，专注于消除一切浪费，同时向客户交付最大价值。第一个核心原则是消除浪费（'muda'），针对七种低效现象。第二个原则是持续改善（'kaizen'），即全体员工每日进行微小渐进的改进。第三个原则是尊重人（'尊重人性'），包括赋权员工并鼓励团队合作，从源头解决问题。
2. Distinguishing Between Quality Control and Quality Assurance | 区分质量控制与质量保证
Question: Explain the difference between quality control and quality assurance. Why might a business shift from quality control to quality assurance?
问题：解释质量控制与质量保证的区别。企业为何可能从质量控制转向质量保证？
Answer: Quality control (QC) is an inspection-based approach that checks products after they are produced to identify defects. It is reactive and often carried out by a specialised quality controller. Quality assurance (QA), in contrast, is a proactive system where quality is built into every stage of the production process, from design to delivery. It focuses on preventing errors rather than detecting them. A business might shift to QA because it can reduce rework costs, boost employee ownership of quality, and improve customer satisfaction. QA aligns well with Total Quality Management (TQM) and lean approaches.
答案：质量控制（QC）是一种基于检验的方法，在产品生产完成后检查以识别缺陷。它是被动的，通常由专职质检员执行。相比之下，质量保证（QA）是一种主动系统，将质量融入从设计到交付的每一个生产阶段。它侧重于预防错误而非检测错误。企业可能转向QA，因为这样可以降低返工成本，增强员工对质量的主人翁意识，并提高客户满意度。QA与全面质量管理（TQM）及精益方法高度契合。
3. The Seven Wastes (Muda) | 七大浪费（Muda）
Question: List the seven types of waste identified in lean production and provide a brief example of each.
问题：列出精益生产中识别的七种浪费，并就每种提供一个简短例子。
Answer: The seven wastes, often remembered by the acronym 'TIMWOOD', are:
答案：七大浪费，通常用首字母缩写词 'TIMWOOD' 记忆，包括：
1. Transport – unnecessary movement of materials, e.g. moving components between distant warehouses.
1. 运输 – 不必要的物料搬运，例如在不同仓库之间远距离移动零部件。
2. Inventory – holding excess stock, e.g. storing months of finished goods that tie up capital.
2. 库存 – 持有过量库存，例如储存数月成品从而占用资金。
3. Motion – unnecessary movement of people, e.g. workers walking long distances to fetch tools.
3. 动作 – 不必要的人员移动，例如工人长途步行去取工具。
4. Waiting – idle time, e.g. operators waiting for a machine to finish its cycle.
4. 等待 – 空闲时间，例如操作员等待机器完成周期。
5. Overproduction – making more than needed, e.g. producing extra batches before demand is confirmed.
5. 过度生产 – 生产超出需求，例如在需求确认前生产额外批次。
6. Over-processing – adding more features than customers value, e.g. polishing internal parts that are never seen.
6. 过度加工 – 增加超出客户需要的特点，例如对从未见到的内部零件进行抛光。
7. Defects – errors that require rework or scrap, e.g. a faulty electronic board that must be discarded.
7. 缺陷 – 需要返工或报废的错误，例如必须丢弃的故障电路板。
4. Just-in-Time (JIT): Benefits and Drawbacks | 准时制生产（JIT）：利与弊
Question: Analyse two benefits and two drawbacks of implementing Just-in-Time production for a furniture manufacturer.
问题：分析一家家具制造商实施准时制生产的两个好处和两个弊端。
Answer: JIT is a pull-based inventory system where materials arrive exactly when needed in production. One key benefit is reduced inventory holding costs; the furniture manufacturer would not need large warehouses for wood and components, freeing up cash flow. A second benefit is improved quality because defects are detected quickly and production stops until the cause is fixed, which reduces waste.
答案：JIT是一种拉式库存系统，物料在生产需要时准时到达。一个关键好处是降低库存持有成本；家具制造商无需为木材和部件租用大型仓库，从而释放现金流。第二个好处是质量改善，因为缺陷能迅速被发现，生产会停止直到原因修复，从而减少浪费。
However, JIT has significant drawbacks. The first is vulnerability to supply chain disruptions; if a timber supplier faces a strike or transport issue, the factory could halt within hours. The second drawback is the heavy reliance on reliable suppliers and a flexible, multi-skilled workforce, which can be difficult and costly to develop. For a furniture maker with variable demand, short lead times may also be hard to achieve.
然而，JIT也有显著弊端。首先是供应链中断的脆弱性；如果木材供应商遭遇罢工或运输问题，工厂可能在数小时内停产。第二个弊端是严重依赖可靠的供应商和多技能灵活员工，这既困难又昂贵。对于需求波动的家具制造商来说，实现短交货期也非易事。
5. Calculating Labour Productivity | 计算劳动生产率
Question: A factory produced 12,500 units in May using 50 workers, each working 160 hours. In June, output rose to 13,200 units with the same workforce and hours. Calculate the labour productivity for both months (units per labour hour) and explain the percentage change.
问题：某工厂5月生产了12,500件产品，雇有50名工人，每人工作160小时。6月产量增至13,200件，员工及工时数不变。计算两个月的劳动生产率（每工时产量）并解释百分比变化。
nits per labour hour. For June: productivity = 13,200 ÷ 8,000 = 1.65 units per labour hour.
答案：劳动生产率 = 总产出 ÷ 总人工小时数。五月：总小时数 = 50 × 160 = 8,000 小时。生产率 = 12,500 ÷ 8,000 = 1.5625 单位每工时。六月：生产率 = 13,200 ÷ 8,000 = 1.65 单位每工时。
Productivity May = 1.5625 units/hour; Productivity June = 1.65 units/hour
生产率 5月 = 1.5625 单位/小时；生产率 6月 = 1.65 单位/小时
The percentage change = [(1.65 – 1.5625) ÷ 1.5625] × 100% ≈ +5.6% the business should investigate whether quality was maintained alongside the output rise.
百分比变化 = [(1.65 – 1.5625) ÷ 1.5625] × 100% ≈ +5.6%。这一增长表明效率有所提升，可能得益于更好的培训、精益措施或机器停机时间减少。然而，企业应调查产出上升的同时质量是否得以保持。
6. Conditions for Successful TQM | 全面质量管理成功实施的条件
Question: Discuss three essential conditions that must be in place for a firm to successfully implement Total Quality Management (TQM).
问题：讨论一家企业成功实施全面质量管理（TQM）所必须具备的三个基本条件。
Answer: TQM is a culture of quality that involves every employee in continuous improvement. First, top management commitment is vital; leaders must actively champion quality, allocate resources, and set a clear vision. Without visible support, TQM programmes lose momentum. Second, employee empowerment and training are essential. Workers need the skills to identify problems and the authority to make changes without waiting for bureaucratic approval.
答案：TQM是一种让每位员工参与持续改进的质量文化。首先，高层管理者的承诺至关重要；领导者必须积极倡导质量、分配资源并确立清晰愿景。没有可见的支持，TQM项目会失去动力。其次，员工赋权和培训不可或缺。工人需具备识别问题的技能，并获得无需官僚审批即可做出改变的权力。
Third, a systematic focus on customers and processes must be embedded. The firm must gather customer feedback, use statistical process control, and benchmark against best practices. TQM also requires a long-term perspective, as results are not immediate. Companies that view TQM as a quick fix often fail to reap its benefits. When all three conditions align, TQM can drive significant cost reduction and competitive advantage.
第三，必须融入系统化的客户与流程关注。企业须收集客户反馈，使用统计过程控制，并参照最佳实践进行对标。TQM还需要长远眼光，因为成果不会立竿见影。将TQM视为速效药的公司往往无法获益。当这三个条件齐备时，TQM可带来显著的成本降低与竞争优势。
7. Categorising Quality Costs | 质量成本分类
Question: A smartphone manufacturer incurs the following costs: staff training on new testing tools; inspection of incoming screens; repair of phones returned under warranty; and loss of reputation after a battery defect scandal. Classify each cost into the four categories of quality costs (prevention, appraisal, internal failure, external failure).
问题：某智能手机制造商发生以下成本：员工接受新检测工具培训；对来料屏幕进行检验；保修期内退回手机的维修；以及电池缺陷丑闻后的声誉损失。将各项成本归类到四种质量成本类别（预防、评估、内部失效、外部失效）中。
Answer: Quality costs are grouped to help businesses balance prevention and failure expenditure. Staff training on new testing tools is a prevention cost, as it aims to stop defects from occurring. Inspecting incoming screens is an appraisal cost, involving evaluation of inputs or outputs to detect non-conformance.
答案：质量成本的分组有助于企业在预防支出和失效支出之间取得平衡。员工接受新检测工具培训属于预防成本，因其旨在防止缺陷产生。对来料屏幕进行检验属于评估成本，涉及对输入或输出进行评估以发现不合格。
Repair of phones returned under warranty is an external failure cost, because the defect reached the customer and required corrective action. The loss of reputation after a battery defect scandal is also an external failure cost, though intangible; it can lead to falling sales and share price. Internal failure costs, by contrast, are spotted before goods leave the factory, such as reworking a faulty circuit board.
保修期内退回手机的维修属于外部失效成本，因为缺陷已到达客户并需要纠正措施。电池缺陷丑闻后的声誉损失同样属于外部失效成本，尽管无形；它可导致销售下滑和股价下跌。相比之下，内部失效成本在货物出厂前即被发现，如对有故障的电路板进行返工。
The table below summarises the classification:
下表总结了分类：
| Cost Item | Category | 成本项目 | 类别 |
|---|---|---|---|
| Training on new testing tools | Prevention | 新检测工具培训 | 预防成本 |
| Inspection of incoming screens | Appraisal | 来料屏幕检验 | 评估成本 |
| Warranty repair | External failure | 保修维修 | 外部失效成本 |
| Loss of reputation | External failure | 声誉损失 | 外部失效成本 |
8. Kaizen and Competitive Advantage | Kaizen与竞争优势
Question: Explain how a culture of kaizen (continuous improvement) can enhance the competitiveness of a fast-food chain.
问题：阐述一种持续改善（kaizen）的文化如何提升一家快餐连锁店的竞争力。
Answer: Kaizen involves all employees, from kitchen staff to managers, in suggesting and implementing small improvements regularly. For a fast-food chain, this could mean rearranging workstation layouts to reduce motion waste by a few seconds per order. Over thousands of orders, the cumulative time saving can cut queue lengths and raise throughput without adding labour.
答案：Kaizen 涉及从厨房员工到管理者的所有人员，定期提出并实施微小改进。对快餐连锁店而言，这可能意味着重新布置工作站布局，使每单操作减少几秒钟的动作浪费。经过成千上万份订单，累积节省的时间可缩短排队长度，并在不增加人力的情况下提高出品速度。
Such a culture also empowers employees. When a crew member notices that a frequently used sauce is stored too far away and suggests moving it closer, management adopts the idea quickly. This boosts morale and reduces staff turnover, saving recruitment costs. Furthermore, kaizen can improve quality and customer satisfaction: tiny adjustments to cooking time or temperature, standardised through employee input, ensure consistent product taste. In a market where speed, quality, and cost control are critical, kaizen provides a sustainable edge over competitors who rely on top-down directives alone.
这种文化还能赋权员工。当一位员工注意到常用酱料存放过远并建议移近时，管理层迅速采纳。这提升了士气并降低了员工流失率，节省招聘成本。此外，kaizen 可以改善质量和顾客满意度：通过员工建议对烹饪时间或温度的微调，并经标准化，确保产品口味一致。在速度、质量和成本控制至关重要的市场中，kaizen 提供了超越仅依赖自上而下指令的竞争对手的可持续优势。
9. Lean Production in Practice: Analysing Impact | 精益生产的实践：影响分析
Question: A car manufacturer reduces its defect rate from 5% to 1% by adopting lean techniques. Analyse the likely short-term and long-term impacts on the business.
问题：某汽车制造商通过采用精益技术将缺陷率从5%降至1%。分析这对企业可能产生的短期和长期影响。
Answer: In the short term, the manufacturer may face retraining costs, resistance from staff accustomed to old methods, and possible disruption as new cellular layouts are introduced. There might also be a temporary dip in output volume while the changes bed in. However, the reduction in defect rate will immediately lower warranty claims and rework costs, potentially freeing up working capital.
答案：短期而言，制造商可能面临再培训成本、熟悉旧方法的员工的抵触，以及引入新单元式布局可能带来的干扰。在变革适应期间，产量可能暂时下滑。但缺陷率的降低将立即减少保修索赔和返工成本，可能释放营运资金。
Long-term benefits are substantial. A 1% defect rate strengthens brand reputation for reliability, supporting premium pricing. Reduced waste also lowers unit costs, which can improve margins or enable more competitive pricing. Additionally, lean techniques often enhance employee engagement as problem-solving teams become more involved. Over time, the manufacturer can attract quality-conscious suppliers and customers, building a virtuous cycle of improvement. The initial short-term pain is likely outweighed by sustainable operational excellence and market share gains.
长期益处相当可观。1%的缺陷率可强化品牌可靠性声誉，支撑溢价定价。减少浪费还降低了单位成本，从而提升利润空间或支持更具竞争力的定价。此外，精益技术常随着问题解决团队的深入参与而提升员工敬业度。随着时间推移，制造商能吸引注重质量的供应商和客户，形成改善的良性循环。初始的短期阵痛很可能被可持续的卓越运营和市场份额增长所超越。
10. Quality Circles vs Kaizen | 质量圈与Kaizen对比
Question: Distinguish between quality circles and kaizen as approaches to improving operations. How might they complement each other?
问题：区分质量圈和kaizen作为改善运营的方法。它们如何相辅相成？
Answer: Quality circles are small groups of volunteers, typically from the same work area, who meet regularly to identify, analyse, and solve work-related problems. Their focus is often on specific quality or productivity issues, and they present solutions to management. Kaizen, on the other hand, is a broader philosophy of continuous improvement involving all employees, where suggestions can be made informally and frequently without formal meetings. Kaizen is less structured and emphasises daily small steps.
答案：质量圈是由来自同一工作区域的小群志愿者组成，定期会面来识别、分析和解决与工作相关的问题。其重点通常放在特定的质量或生产力问题上，并向管理层提交解决方案。另一方面，Kaizen是一种涉及全体员工的更广泛的持续改善哲学，员工可非正式且频繁地提出建议，无需正式会议。Kaizen 结构化程度较低，强调每日小步前进。
They complement each other well. Quality circles can serve as a formal platform to tackle more complex, cross-functional problems that emerge from Kaizen suggestions. Meanwhile, Kaizen activity feeds a steady stream of small ideas into quality circles for deeper analysis. Together they foster a participative culture where empowerment and problem-solving become everyone's daily habit, reinforcing lean objectives.
二者可有效互补。质量圈可作为一个正式平台，应对由Kaizen建议引发的更复杂的跨职能问题。同时，Kaizen行动为质量圈持续输入微小创意以供深入分析。它们共同培育一种参与式文化，使赋权和解决问题成为每个人的日常习惯，从而强化精益目标。
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