GRADE 10 SCIENCE · CHAPTER 1
Engineering & design
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Engineering design
Compare process designs using output and waste
Use controlled process data to select a design that meets a production requirement with less recorded waste.
AN EXAMPLE FROM THIS CHAPTER
Only desired product and one recorded waste stream are shown; other material is not listed. Process A: 85 g desired product; 12 g recorded waste. Process B: 90 g desired product; 18 g recorded waste. Process C: 75 g desired product; 5 g recorded waste.
These controlled model trials use the same input amount. The process must make at least 80 g of desired product. Which eligible process has the least recorded waste?
Show answer & explanation
Process A
First keep processes making at least 80 g. Among them, Process A has the smallest recorded waste. Other costs or hazards would require additional criteria.
Curriculum & source notes
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