Critical evaluation (AQA GCSE Design and Technology): Revision Notes
Critical evaluation
Critical evaluation involves analysing how external factors influence design decisions when developing new and emerging technologies. Understanding these factors helps designers make informed choices about product development and lifecycle management.
Planned obsolescence
Planned obsolescence refers to the deliberate design strategy where products are created to have a specific, often shortened, lifespan. This approach ensures that products become outdated or unusable within a predetermined timeframe, encouraging consumers to purchase replacements regularly.
Companies implement planned obsolescence through several key strategies:
Choosing appropriate components - Manufacturers select parts that will last only as long as the intended product lifespan, rather than using more durable alternatives that might last longer.
Strategic upgrade timing - Companies decide how frequently to upgrade design elements or launch completely new versions, often timing these releases to coincide with when older models start showing their age.
Technology-driven replacement - New products are launched using cutting-edge technologies or following latest trends to maintain market competitiveness and consumer interest.
Benefits of planned obsolescence:
- Creates consistent demand as customers need to replace products regularly
- Allows companies to use less expensive components since products don't need to last indefinitely
- Consumers often appreciate getting newer, improved versions with updated features
Drawbacks of planned obsolescence:
- Customers may feel frustrated about having to make frequent purchases
- Can create negative publicity if consumers feel they're being deliberately misled about product durability
Design for maintenance
When developing products, designers face an important decision about whether their creations should be easily repairable by users or designed as replaceable units. This choice significantly impacts both user experience and business operations.
Advantages of repairable design:
- Products maintain usefulness for extended periods, which customers often view as better value for money
- Enhanced company reputation as customers appreciate the cost-saving potential of repairs rather than full replacements
Challenges of repairable design:
- Providing technical support for repairs requires specialised knowledge and resources, increasing operational costs
- Companies must maintain inventory of replacement parts, which occupies valuable storage space and ties up capital
- Some consumers may prefer the simplicity of buying completely new products rather than dealing with repair processes
- Home repairs can sometimes create safety hazards if not performed correctly by qualified individuals
Ethics in technology design
Ethical considerations play a crucial role in responsible technology development. Companies have moral obligations that extend beyond simple profit-making to include fair treatment of all stakeholders involved in their operations.
Key ethical principles include:
Fair labour practices - Companies must not exploit workers in host countries or take advantage of suppliers, ensuring fair wages and safe working conditions throughout their supply chains.
Environmental responsibility - Organisations need to minimise environmental damage by using sustainable materials, reducing energy consumption during production and use, and properly managing waste products and byproducts.
User-centered design - Companies should prioritise the genuine needs of end users and consider the broader impact their products will have on society and individual wellbeing.
Environmental considerations
Balancing consumer demand for new products against environmental protection requires careful analysis and strategic planning. Companies increasingly use Life Cycle Assessment (LCA) tools to evaluate their environmental impact comprehensively.
Life Cycle Assessment examines:
Materials and processing - Analysing the environmental cost of raw material extraction, refinement, and initial processing stages.
Energy consumption and emissions - Measuring the pollution generated during manufacturing processes and the energy required for production.
Manufacturing waste - Accounting for byproducts and waste materials created during production, including how these are managed or disposed of.
Transportation impact - Calculating the environmental cost of moving materials to factories and distributing finished products to consumers.
End-of-life considerations - Planning for packaging disposal, product construction materials, and eventual product disposal when items reach the end of their useful lives.
Understanding obsolescence through examples
Practical Example: Mobile Phone Obsolescence
Mobile phone technology provides an excellent illustration of how obsolescence works in practice. Modern smartphones become outdated not because they stop functioning, but because rapidly advancing technology makes newer models significantly more attractive to consumers.
How it works: The mobile phone industry demonstrates planned obsolescence through continuous technological advancement. Each new generation of phones includes enhanced features, improved applications, and increased memory capacity compared to previous versions.
The result: This constant innovation means that older phones, while still functional, appear limited and outdated by comparison. This pattern encourages consumers to upgrade regularly, even when their current devices meet their basic communication needs. The psychological appeal of having the latest technology, combined with genuinely useful new features, creates a market where planned obsolescence occurs naturally through innovation rather than deliberate product degradation.
Key Points to Remember:
- Critical evaluation involves analysing external factors that influence design decisions in technology development
- Planned obsolescence strategically limits product lifespan through component choices, upgrade timing, and new technology releases
- Design for maintenance requires weighing the benefits of repairable products against the costs and complexity of providing repair support
- Ethical design demands fair treatment of workers, environmental responsibility, and genuine consideration for user needs
- Life Cycle Assessment provides a comprehensive framework for evaluating environmental impact from materials through disposal