上游充通大 SHANGHAI JIAO TONG UNIVERSITY Concept Selection Example:Reusable Syringe Seven criteria for choice 1.Ease of handing 2.Ease of use 3.Readability of dose settings 4.Dose metering accuracy 5.Durability 6.Ease of manufacture 7.PortabilityConcept Selection Example: Reusable Syringe Seven criteria for choice 1. Ease of handing 2. Ease of use 3. Readability of dose settings 4. Dose metering accuracy 5. Durability 6. Ease of manufacture 7. Portability