Component 2: Non-examined assessment (NEA) - Investigate

Overview

The 'Evaluate' stage of the Component 2 Non-Examined Assessment (NEA) is the culmination of your practical project. Having researched, designed, and manufactured a prototype, you must now objectively assess its success. This section is not merely a description of what you have made; it is a critical analysis of how well the prototype meets the needs of the user and the criteria established in your initial product specification. Furthermore, you must evaluate the sustainability of your final prototype through a Life Cycle Assessment (LCA). Examiners reward candidates who provide measurable, evidence-based conclusions and demonstrate a deep understanding of the wider environmental impact of their design decisions.

Key Knowledge & Theory

Core Concepts

1. Objective Testing Against CriteriaTesting must be rigorous and objective. This involves designing tests that directly address the criteria in your product specification (e.g., function, aesthetics, ergonomics, safety). Tests must be conducted under realistic conditions—simulating the actual environment and user interactions the product was designed for.

**2. Life Cycle Assessment (LCA)**An LCA is a systematic analysis of the environmental impact of a product throughout its entire life span. For the NEA, candidates must apply this specifically to their final prototype, considering raw material extraction, manufacturing processes, distribution, use, and end-of-life disposal or recycling.

Key Principles of Evaluation

Technical Vocabulary

• Tolerance: The acceptable margin of error in a measurement or performance criterion.
• Ergonomics: The study of people's efficiency in their working environment; how the product interacts physically with the user.
• Anthropometrics: The use of body measurements to determine the optimum size for products for comfortable and efficient use.
• Sustainability: Designing to meet present needs without compromising the ability of future generations to meet their own needs.
• Carbon Footprint: The total amount of greenhouse gases produced directly and indirectly by the product's life cycle.

Practical Skills

Techniques & Processes for Evaluation

Conducting Performance TestsDesign tests that push the prototype to its intended limits. If you have designed a storage unit, test its load-bearing capacity using actual weights. Record the results accurately, noting any deflection, stress, or failure points.

Gathering User FeedbackCreate structured questionnaires or observation checklists for your target market to use while interacting with the prototype. Ask specific questions related to the specification (e.g., "Rate the comfort of the handle from 1 to 5") rather than vague questions (e.g., "Do you like it?").

Materials & Equipment for Testing

Use appropriate measuring equipment to gather data: calipers for precise dimensions, scales for weight, force meters for structural integrity, and cameras to record the testing process visually.

Portfolio/Coursework Guidance

Assessment Criteria

Examiners are looking for:

1. Analysis of the prototype against the product specification using tests under realistic conditions.
2. Analysis of the results obtained from prototype testing.
3. Evaluation of whether the prototype meets the product specification, with clear, substantiated conclusions.
4. Evaluation of the sustainability of the final prototype through a Life Cycle Assessment (LCA).

Building a Strong Portfolio

To secure high marks, your portfolio must feature photographic evidence of the testing process. Do not just state that a test occurred; show the prototype in use, with annotations highlighting key observations. Present your findings in clear tables that cross-reference the original specification criteria, the test method, the result, and a conclusion on whether the criterion was met, partially met, or not met.

Exam Component

Written Exam Knowledge

While the NEA Evaluate section is coursework, the principles apply directly to the written exam. You may be asked to evaluate a given product design, suggest testing methods, or complete an LCA for a specific material or product. Understanding how to structure an objective evaluation is crucial for extended response questions.

Practical Exam Preparation

Treat your NEA evaluation as practice for the written paper. The more rigorous and specific you are in evaluating your own prototype, the better equipped you will be to critically analyse the products presented in the exam.

Audio Revision

Listen to the podcast below for an in-depth discussion on how to maximize your marks in the Evaluate section, including examiner tips and common pitfalls.