IGCSE WJEC Engineering: Case Study Practical Workout | IGCSE WJEC 工程：案例分析实战演练

📚 IGCSE WJEC Engineering: Case Study Practical Workout | IGCSE WJEC 工程：案例分析实战演练

In WJEC Engineering, case studies test your ability to apply design, materials, manufacturing and evaluation skills to real products. This workout guides you through a structured method, worked examples and a practice brief so you can answer case-study questions with confidence.

在 WJEC 工程中，案例分析考查你将设计、材料、制造和评估技能应用于真实产品的能力。本次实战演练将带你掌握结构化方法、例题解析和实践任务，让你能够自信地应对案例分析题。

1. Why Case Studies Matter in WJEC Engineering | 为什么案例分析在 WJEC 工程中重要

Case studies in WJEC Engineering are not just comprehension exercises; they require you to make decisions like a professional engineer. You must interpret a product, recognise design intent and support every answer with technical evidence.

WJEC 工程中的案例分析不仅仅是阅读理解，它要求你像专业工程师一样做出决策。你必须解读产品、识别设计意图，并用技术证据支持每一个答案。

Examiners often reward answers that link a feature to a material property, a manufacturing process or a user need. This means you should practise writing short chains of reasoning: ‘The lever is made from aluminium because…’

考官通常会奖励将产品特征与材料性能、制造工艺或用户需求联系起来的答案。这意味着你应该练习写出简短的推理链：该把手由铝制成，因为……

2. The 5-Step Case Study Method | 五步案例分析法

A repeatable method prevents you from missing marks. Use these five steps for any product: observe, disassemble, analyse, evaluate and improve.

一套可重复的方法可以防止你丢分。对任何产品都使用这五个步骤：观察、拆解、分析、评价和改进。

First, observe the product in use and list its functions. Second, disassemble it mentally or physically and name each component. Third, analyse materials, forces and manufacturing methods. Fourth, evaluate quality, cost and environmental impact. Fifth, suggest one realistic improvement and justify it.

首先，观察产品使用过程并列出功能。其次，从结构上拆解并说出每个零件的名称。第三，分析材料、受力和制造方法。第四，评价质量、成本和环境影响。第五，提出一个现实的改进方案并说明理由。

This method mirrors the WJEC marking criteria, which often include analysis, evaluation and justification. Keep each step specific and avoid vague words such as ‘strong’ or ‘cheap’ without data.

这一方法对应 WJEC 评分标准，通常包括分析、评价和论证。每一步都要具体，避免在缺少数据的情况下使用 ‘坚固’ 或 ‘便宜’ 这类模糊词汇。

3. Product Analysis: Bicycle Brake Lever | 产品分析：自行车刹车把手

A bicycle brake lever is a useful case study because it combines a lever mechanism, a pivot, a cable and an ergonomic grip. The main function is to convert a small hand force into cable tension that operates the brake caliper.

自行车刹车把手是一个有用的案例，因为它结合了杠杆机构、转轴、钢索和符合人体工程学的握把。其主要功能是将手部的小力转化为操作刹车卡钳的钢索张力。

Typical components include an aluminium lever blade, a steel pivot pin, a nylon cable adjuster and a rubber grip cover. Each component is chosen for a specific reason, such as corrosion resistance or comfortable contact.

典型零件包括铝合金把手柄、钢制转轴销、尼龙钢索调节器和橡胶握把套。每个零件的选择都有具体原因，例如耐腐蚀或接触舒适。