Design methods and processes：練習問題

• a.To calculate the total material costs based on the average volume of the human form.
• b.To ensure the physical dimensions of a product accommodate the body measurements of at least \( 90 \% \) of the target user group.
• c.To evaluate the environmental impact and 'product miles' associated with the manufacturing of user-specific components.
• d.To determine the psychological comfort and intuitive interaction a user has with a product interface.

• a.The mean average is only used when designing for the elderly and disabled (Inclusive Design).
• b.Standard deviation calculations require at least three separate percentile markers to be valid for BSI certification.
• c.Designing for the mean would result in a product that is potentially uncomfortable or unusable for \( 50 \% \) of the population.
• d.The \( 5^{th} \) percentile represents the largest possible measurements, ensuring a 'one size fits all' approach.

• a.Because the findings from testing frequently lead back to the modification of the design proposal or specification.
• b.Because it ensures the product follows the circular economy principles of recycling and reuse.
• c.Because prototypes are always manufactured using rotational moulding techniques to save costs.
• d.Because the evaluation must occur exactly every \( 360 \) days to comply with ISO standards.

• a.The designer should incorporate adjustability into the product to accommodate the wide variance in user dimensions.
• b.The designer should switch to a batch production method to reduce the cost of custom moulds.
• c.The designer should ignore the reach measurements and focus solely on the aesthetic 'form' of the product.
• d.The designer should use the mean value as a fixed dimension to simplify the manufacturing process.

• a.Using CAD to generate 3D presentation drawings for marketing advertisements.
• b.Calculating the tensile strength of the housing material and performing a feasibility study.
• c.Analysis of historical design styles and reviewing published British Standards.
• d.Interviews, focus groups, and the observation of users interacting with ergonomic models.

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