Re-tell Lecture — Industrial Design

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. Planned obsolescence and design ethics Planned obsolescence is the practice of deliberately designing products with a limited useful lifespan so that consumers are forced to replace them. The concept dates back to the nineteen twenties, when a cartel of light bulb manufacturers agreed to reduce bulb lifespan from twenty-five hundred hours to one thousand hours to increase sales. Today, planned obsolescence takes more subtle forms: software updates that slow older devices, fashion cycles that make last year's products feel outdated, and designs that make repair impossible by using proprietary screws or gluing components together. Critics argue this is environmentally destructive because it generates enormous amounts of electronic waste and consumes resources unnecessarily. A growing right-to-repair movement is pushing for legislation requiring manufacturers to make spare parts and repair manuals available to consumers. Some companies are responding: modular phone designs allow users to replace individual components, and several European countries have introduced repairability scores that must be displayed alongside products at the point of sale.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. The psychology of colour in design Colour influences human behaviour in ways that designers exploit deliberately. Red raises heart rate and creates a sense of urgency, which is why it dominates clearance sale signs and fast-food restaurant interiors — both environments where quick decision-making benefits the business. Blue promotes calm and trust, making it the default choice for banks, technology companies, and healthcare providers. Green signals nature and health, which explains its prevalence in organic food packaging and eco-friendly branding. However, colour associations are not entirely universal. White represents purity and weddings in Western cultures but mourning in several East Asian traditions. Yellow is associated with happiness in many Western countries but with caution or cowardice in others. Effective design acknowledges these cultural differences, particularly for products sold internationally. Research also shows that colour preferences are influenced by personal experience: people who have positive associations with a particular colour respond more favourably to products that use it, regardless of any general cultural meaning.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. Biomimicry in engineering Biomimicry is the practice of solving engineering problems by imitating structures and processes found in nature. The underlying logic is that organisms have been refined by billions of years of natural selection, and their solutions to physical challenges are often more efficient than anything human engineers have devised independently. The high-speed Japanese bullet train provides a famous example. Engineers redesigned its nose after studying the kingfisher, a bird that dives into water with minimal splash. The kingfisher's beak shape creates a smooth transition between air and water, reducing the pressure wave. Applied to the train, this shape eliminated the loud boom that occurred whenever it entered a tunnel at high speed, while also reducing energy consumption. Velcro is another classic case: its inventor was inspired by the way burdock seeds clung to his dog's fur using tiny hooks. Current research explores shark skin patterns that reduce drag on ship hulls and termite mound ventilation systems that could improve building cooling without air conditioning.