📚 Engineering Case Study Practicals for CCEA Year 13 | CCEA 13年级工程案例分析实战演练
Mastering the engineering case study is essential for success in CCEA Year 13. This type of question tests your ability to apply theoretical knowledge to a real-world scenario. In this practical guide, we will walk through a structured approach using a worked example: designing a portable, height-adjustable stand for a classroom projector. You will learn how to analyse requirements, develop a specification, generate and evaluate design concepts, select materials, plan manufacturing, estimate costs, and assess safety.
掌握工程案例分析对于CCEA 13年级的成功至关重要。这类问题考查你将理论知识应用于实际场景的能力。在本实战指南中，我们将通过一个示例逐步讲解结构化方法：设计一款便携式、高度可调的教室投影仪支架。你将学习如何分析需求、制定规格、生成和评估设计概念、选择材料、规划制造、估算成本并评估安全性。
1. Understanding the Case Study Brief | 理解案例分析任务书
Start by carefully reading the provided brief. Identify who the client is (e.g., a school), what the primary need is (a portable projector stand), and any explicit constraints such as a maximum budget of £50, a weight limit under 10 kg, and a requirement that the stand be movable between rooms. Note any implied needs like stability on carpeted floors or simple operation by teachers.
首先仔细阅读提供的任务书。确定客户是谁（如学校）、主要需求是什么（便携式投影仪支架），以及任何明确的限制条件，例如最高预算50英镑、重量限制在10公斤以下，以及支架需能在房间之间移动。还要注意隐含需求，如在地毯地面上的稳定性或教师操作的简便性。
Highlight key performance parameters: the stand must safely support a 5 kg projector, provide an adjustable height range of at least 0.8 m to 1.5 m to suit different seating configurations, and remain stable on slightly uneven classroom floors. Also capture ergonomic factors like cable management and ease of locking the height.
标出关键性能参数：支架必须安全支撑5公斤重的投影仪，提供至少0.8米至1.5米的可调高度范围以适应不同座椅布局，并在稍有不平的教室地面上保持稳定。同时关注人机工程因素，如线缆管理和锁定高度的便利性。
2. Developing a Comprehensive Design Specification | 制定全面的设计规格
The key technical specifications derived from the client brief are summarised in the table below. These measurable targets will be used to benchmark each design concept.
| Parameter | Requirement |
|---|---|
| Maximum projector mass | 5 kg |
| Height adjustment range | 0.8 – 1.5 m |
| Total weight of stand | < 10 kg |
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