Values have a long-term influence on design longevity because they shape people's perceptions and behaviors. Personality determines how people will react to designs. Trends only have a short-term influence as they reflect current interests and needs that shift over time. Competition affects a design's viability and stability by pushing designers to differentiate their designs and encouraging problem-solving to stay relevant. To achieve longevity, designers need to balance understanding long-term influences like values and personality with short-term influences like trends and responding to competition. This helps them meet people's underlying needs in ways that improve lives.