How do inclusive and user-centred design make products work for the widest range of people?
Inclusive design and user-centred design (UCD), designing for diversity of age, size and ability, the difference between inclusive design and specialist or assistive design, user research and involving users throughout the process, and how considering a wide range of users improves products and widens the market.
A focused answer to the Edexcel 9DT0 content on inclusive design and user-centred design, covering designing for diversity of age, size and ability, inclusive versus specialist design, involving users through research, and how this widens the market.
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What this dot point is asking
Edexcel wants you to explain inclusive design and user-centred design (UCD): designing for diversity of age, size and ability, the difference between inclusive and specialist or assistive design, involving users through research, and how considering a wide range of users improves products and widens the market.
The answer
Inclusive design
Examples of inclusive features: chunky easy-grip handles (comfortable for weak or arthritic hands but pleasant for everyone), lever taps, large clear labelling, step-free entrances and simple intuitive controls.
Inclusive versus specialist or assistive design
Designing for diversity
Inclusive design considers the diversity of users: age (children and older people), size (using anthropometric percentile ranges), and ability (vision, hearing, dexterity, mobility, cognition). Designing for the edges of this range often improves the product for everyone, the "curb-cut effect", where a feature added for one group benefits all (dropped kerbs help wheelchair users, buggies and trolleys alike).
User-centred design (UCD)
The benefits
Considering a wide range of users and following UCD produces products that fit real needs, are more usable and accessible, find problems early when they are cheap to fix, widen the market, and reduce the risk of an expensive failure. The cost is the time and money for research and testing, which is usually justified for consumer products.
Examples in context
OXO Good Grips kitchen tools were designed inclusively with large, soft, easy-grip handles that help people with limited hand strength yet feel better for everyone, becoming a commercial success and widening the market. Lever taps, large-button phones, step-free transport and clear signage all benefit far more than the groups they were aimed at. Following user-centred design, a team researches and involves real users, tests prototypes with them and iterates, so the final product genuinely fits and avoids costly failure. Explaining inclusive design (versus specialist design) and the benefits of UCD, including the market gain, is exactly what Edexcel rewards.
Try this
Q1. Define inclusive design. [1 mark]
- Cue. Designing mainstream products to be usable by as many people as possible, regardless of age, size or ability, without special adaptation.
Q2. State the difference between inclusive design and assistive (specialist) design. [2 marks]
- Cue. Inclusive design widens a mainstream product for the broadest range of users; assistive design creates a dedicated product for a specific need (such as a wheelchair).
Q3. Give one benefit of a user-centred design approach. [1 mark]
- Cue. The product fits real user needs and is more usable and accessible (and problems are found early, reducing the risk of failure and widening the market).
Exam-style practice questions
Practice questions written in the style of Pearson Edexcel exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Edexcel 20204 marksExplain what is meant by inclusive design and give an example of an inclusively designed product feature.Show worked answer →
Award up to two marks for the meaning and up to two for a valid example with justification.
Inclusive design means designing mainstream products so they can be used by as many people as possible, regardless of age, size or ability, without the need for special adaptation or specialist products.
Example: chunky, easy-grip handles on kitchen utensils (such as Good Grips peelers) are comfortable for people with reduced hand strength or arthritis but are equally pleasant for everyone, so one mainstream product suits a very wide range of users. Other examples include lever taps, large clear labelling and step-free entrances.
Markers reward the "usable by as many people as possible without special adaptation" meaning plus a genuine inclusive feature that benefits a wide range, not a specialist medical aid.
Edexcel 20226 marksDiscuss the benefits of using a user-centred design (UCD) approach when developing a new consumer product.Show worked answer →
Extended-response item marked on levels (range of benefits, how UCD works and a judgement).
User-centred design puts the needs, wants and limitations of real users at the heart of the process, researching and involving users from the start and testing prototypes with them throughout, then iterating on the feedback.
Benefits: the product fits real needs and is more usable, comfortable and accessible, so it is more likely to succeed; problems are found early when they are cheap to fix; designing inclusively widens the potential market; and user involvement builds products people actually want, reducing the risk of expensive failure.
The trade-off is that research and testing take time and money. A strong answer explains how UCD works (research, involve, prototype, test, iterate), gives several benefits (fit, usability, market, reduced risk) and judges that the investment is usually worthwhile, especially for consumer products.
Related dot points
- Anthropometric data (measurements of the human body), the use of percentiles and percentile ranges, primary and secondary data sources, how to choose the appropriate percentile and design limits (design for the 5th to 95th percentile, design for the extreme, design for adjustability or the average), and applying anthropometric data to set product dimensions.
A focused answer to the Edexcel 9DT0 content on anthropometric data and percentiles, covering body measurements, percentile ranges, choosing design limits (5th to 95th, extreme, adjustable or average), and applying anthropometric data to set product dimensions.
- Ergonomics as the fit between a product and the user, covering physical ergonomics (comfort, posture, effort, reach), the human senses and feedback, controls and displays, the role of anthropometric data in ergonomic design, and how good ergonomics improves comfort, safety, efficiency and usability.
A focused answer to the Edexcel 9DT0 content on ergonomics and usability, covering the fit between product and user, comfort, posture and effort, the human senses and feedback, controls and displays, and how good ergonomics improves safety and efficiency.
- The social, moral and ethical issues affecting design and manufacture, including fair trade and ethical sourcing, working conditions and labour in global supply chains, the social and ethical responsibilities of designers and companies, inclusive design and consumer protection, and the moral questions raised by consumption, waste and the use of scarce resources.
A focused answer to the Edexcel 9DT0 content on social, moral and ethical issues in design and manufacture, covering fair trade and ethical sourcing, working conditions in global supply chains, designer and company responsibility, inclusive design, and the ethics of consumption and waste.
- Identifying needs and writing a design brief and a design specification, including the design context and client or user, the difference between a brief and a specification, writing measurable and justified specification criteria, the role of research (market, user and product analysis) in informing them, and using the specification to guide and evaluate design.
A focused answer to the Edexcel 9DT0 content on design briefs and specifications, covering identifying needs, the difference between a brief and a specification, writing measurable justified criteria, the role of research, and using the specification to guide and evaluate design.
Sources & how we know this
- Pearson Edexcel A-Level Design and Technology: Product Design (9DT0) specification — Pearson Edexcel (2017)