Introduction: Mastering Product Analysis and Improvement
Welcome to one of the most practical and high-scoring areas of your AS 1: Compulsory Paper – Design and Materials exam! Whether you are analyzing a simple handheld potato peeler or an intricate power tool casing, product analysis is all about looking at an existing object with a critical designer's eye.
In this chapter, you will learn how to break products down into their core design aspects—such as user needs, function, materials, safety, and sustainability—and, most importantly, how to propose realistic, technically accurate improvements.
Don't worry if this seems challenging at first! Once you learn the specific technical vocabulary and the structured framework examiners look for, you will be able to tackle these questions with total confidence.
---1. Key Criteria for Analyzing a Product
When you are given an existing product in an exam question, you must evaluate it across six central pillars.
A. Identification of User Needs (Ergonomics & Anthropometrics)
A successful product must fit the human body and fulfill the needs of its specific target market.
• Target Market: Who is using the product? A product designed for an elderly user with limited grip strength requires different features (e.g., larger tactile grips, lightweight casing) compared to a product designed for a toddler or a professional tradesperson.
• Anthropometrics: This refers to the study and measurement of the human body (e.g., hand length, grip diameter, eye height). Designers use anthropometric data tables (often working between the 5th and 95th percentiles) to ensure products physically fit the intended user group.
• Ergonomics: This is how the user interacts with the product safely and comfortably. It includes tactile feedback, comfort of handles, ease of reaching switches, and intuitive operation.
B. Functional Performance
Functional performance evaluates one simple question: Does the product do its intended job efficiently and reliably?
• Does it withstand everyday operational forces without bending or breaking?
• Are the moving parts smooth and easy to operate?
• Is it stable during use, easy to clean, and straightforward to store?
C. Aesthetics
Aesthetics determines the visual and sensory appeal of the product.
• Form: The overall 3D shape, outline, and profile (e.g., geometric, organic, streamlined).
• Color: Used to create visual harmony, highlight interactive components (like an emergency stop button), or suit a brand identity.
• Texture: Surface finishes (such as matte, high gloss, or textured rubberized overmoulding) that provide aesthetic variety as well as tactile grip.
• Proportion: How the individual elements visually balance with one another.
D. Safety and Standards
Products must protect the user from injury and comply with national and international legislation.
• Safety Standards: Look for marks of conformity such as the BSI Kitemark (showing independent testing to British Standards) and the CE / UKCA mark (confirming compliance with essential health, safety, and environmental protection legislation).
• Hazard Identification: Assess sharp exposed edges, pinch points in mechanisms, overheating risks, electrical insulation, and chemical toxicity in plastics or finishes.
E. Environmental Impact & Life Cycle Analysis (LCA)
Designers must consider a product's footprint from "cradle to grave"—from raw material extraction to final disposal.
Life Cycle Analysis (LCA): Evaluates environmental impact across four main stages: sourcing raw materials, manufacturing/processing, transportation and in-service use, and end-of-life disposal.
The 6 Rs of Sustainability:
1. Reduce: Minimizing the volume of material used (e.g., thinning wall sections or removing excess packaging).
2. Reuse: Designing components or containers that can be repurposed without industrial reprocessing.
3. Recycle: Selecting materials—such as standard thermoplastics—that can be melted down and reprocessed into new items.
4. Repair: Designing for disassembly so individual worn-out parts can be replaced rather than discarding the whole unit.
5. Refuse: Avoiding unnecessary, non-recyclable, or environmentally harmful materials.
6. Rethink: Asking whether the product's function can be achieved in a completely different, lower-impact way.
F. Materials and Industrial Processes
You must be able to recognize standard materials and their associated manufacturing methods, justifying why they were chosen.
• Thermoplastics (e.g., ABS, Polypropylene): Chosen for complex shapes, electrical insulation, impact resistance, and recyclability. Typically manufactured via Injection Moulding.
• Thermosetting Plastics: Chosen for high heat resistance and rigidity, but note that they cannot be melted down and recycled.
• Non-Ferrous Metals (e.g., Aluminium, Zinc alloys): Chosen for high strength-to-weight ratio, corrosion resistance, and precision. Often manufactured via Die Casting.
• Selection Justification: Always justify materials based on both performance requirements (e.g., stiffness, weight, durability) and cost-effectiveness in mass production.
Key Takeaway: When analyzing any product, systematically check off all six categories: User Needs, Function, Aesthetics, Safety, Environmental Impact, and Materials/Processes.
---2. The Redesign & Improvement Process
In the AS 1 exam, you are frequently presented with an existing product design that has notable flaws and asked to propose realistic, technical improvements.
The Exam Format: Feature \(\rightarrow\) Function \(\rightarrow\) Improvement
Examiners commonly provide a structured table layout. You must be prepared to identify a specific part, explain its current role, and provide a concrete engineering improvement:
• Feature: Identify the exact component or area (e.g., "Moulded plastic handle casing").
• Function: State what that component currently does (e.g., "Allows the user to grip and control the device during operation").
• Suggested Improvement: Explain precisely how to make it better using correct technical terminology (e.g., "Add an overmoulded Thermoplastic Elastomer (TPE) textured grip and internal reinforcing ribs to increase stiffness without adding excessive wall thickness").
Using Specific Technical Modifications
Avoid broad, vague statements! Use the following exact technical terms when proposing improvements:
• Strengthening without added mass: Specify adding internal ribs or webbing to reinforce thin plastic walls.
• Reducing stress concentration: Specify adding a fillet (an internal rounded corner) or radiused edge where two surfaces meet to prevent stress fractures.
• Mould extraction: Specify adding a draft angle (taper) of \(1^\circ\) to \(2^\circ\) on vertical walls so polymer or die-cast parts can easily release from moulds.
• Fastening and assembly: Specify moulded screw bosses (cylindrical posts for self-tapping screws) or snap-fit joints to eliminate the need for permanent chemical adhesives, allowing easy maintenance and end-of-life recycling.
3. Annotated Sketching for Improvement Tasks
When the exam asks you to sketch your proposed redesign, high marks are awarded for clarity, correct proportions, and detailed technical annotations.
How to Annotate Effectively
• Leader Lines: Use clear, straight pointer lines touching the exact modification you are explaining.
• State the Material and Process: Clearly label the recommended material (e.g., "High-Impact ABS") and the production method (e.g., "High-pressure Die Casting").
• Show Joining and Fastening: Make sure your drawing explains how new parts connect to original components (e.g., "M4 stainless steel machine screws locating into brass threaded inserts").
• Highlight Ergonomic Details: Include specific details such as finger recesses, textured grips, or clearance dimensions tailored to the user profile described in the question.
4. Pitfalls to Avoid: Advice from the Chief Examiner
To secure top-band marks in AS 1, steer clear of these frequent mistakes identified in past examination series:
• The "Make it stronger / Make it bigger" trap: Saying "make it out of thicker metal so it's stronger" earns zero technical marks. Instead, write: "Form a pressed flange along the edge or add stamped ribs to increase section modulus and stiffness without increasing overall sheet thickness."
• Ignoring the Stated User Group: If the exam scenario specifies children, your improvements must address non-toxic materials, tamper-proof battery compartments, and rounded corners. If it specifies an elderly user, focus on high-contrast markings, lightweight handles, and low-force switches.
• Confusing Recyclability of Plastics: Never suggest recycling a thermosetting plastic. If a product component is made from a thermoset resin and you want to improve its environmental impact, propose switching to a recyclable engineering thermoplastic (such as Polypropylene or ABS) or designing it for modular component reuse.
• Drawings with No Technical Context: A beautifully shaded artistic sketch with no labels will score poorly. A neat, proportional 2D/3D line drawing with comprehensive technical callouts detailing materials, wall thicknesses, draft angles, and fixing methods will score top marks.
5. Quick Chapter Summary Checklist
Before sitting your exam, make sure you can:
• Evaluate any given product against the 6 core criteria: User Needs, Function, Aesthetics, Safety, Environmental Impact, and Materials & Processes.
• Recall and apply the 6 Rs of sustainability (Reduce, Reuse, Recycle, Repair, Refuse, Rethink).
• Identify safety marks including the BSI Kitemark and CE/UKCA mark.
• Complete a structured Feature \(\rightarrow\) Function \(\rightarrow\) Suggested Improvement analysis table.
• Use precise manufacturing terminology: ribs, fillets, draft angles, screw bosses, and snap-fits.
• Produce clear annotated sketches specifying realistic materials, manufacturing processes, and assembly methods.