上游充通大 e SHANGHAI JIAO TONG UNIVERSITY When are Specification Established? Concept Syetem-Level Detall Testing and Productlon Development Ramp-Up System Spec Critical Design Production Approval Revlew Revlew Review Approval Mission Develppment Statement Identify Establish Generate Select Test Set Plan Plan Customer Target Product Product Product Final Downstream Needs Specifications Concepts Concept(s) Concept(s) Specifications Development Perform Economic Analysis Benchmark Competitive Products Build and Test Models and Prototypes
When are Specification Established?
上游充通大学 SHANGHAI JIAO TONG UNIVERSITY Concept Development Process Mission Development Statement Identify Establish Generate Select Test Set Plan Plan Customer Target Product Product Product Final Downstream Needs Specifications Concepts Concept(s) Concept(s) Specifications Development Perform Economic Analysis Benchmark Competitive Products Build and Test Models and Prototypes Target Specs Final Specs Based on customer needs Based on selected concept, and benchmarking feasibility,models,testing, and trade-offs
Concept Development Process Perform Economic Analysis Benchmark Competitive Products Build and Test Models and Prototypes Identify Customer Needs Establish Target Specifications Generate Product Concepts Select Product Concept(s) Set Final Specifications Plan Downstream Development Mission Statement Test Product Concept(s) Development Plan Target Specs Based on customer needs and benchmarking Final Specs Based on selected concept, feasibility, models, testing, and trade-offs
上游充通大 e SHANGHAI JIAO TONG UNIVERSITY The Product Specs Process Set Target Specifications Based on customer needs and benchmarks >Develop metrics for each need >Set ideal and acceptable values Refine Specifications Based on selected concept and feasibility testing >Technical modeling >Trade-offs are critical Reflect on the Results and the Process >Critical for ongoing improvement
The Product Specs Process Set Target Specifications Based on customer needs and benchmarks Develop metrics for each need Set ideal and acceptable values Refine Specifications Based on selected concept and feasibility testing Technical modeling Trade-offs are critical Reflect on the Results and the Process Critical for ongoing improvement
上游充通大 e SHANGHAI JIAO TONG UNIVERSITY Establish Target Specifications The process of establishing the target specifications contains four steps: 1.Prepare the list of metrics. 2.Collect competitive benchmarking information. 3.Set ideal and marginally acceptable target values. 4.Reflect on results and the process
Establish Target Specifications The process of establishing the target specifications contains four steps: 1. Prepare the list of metrics. 2. Collect competitive benchmarking information. 3. Set ideal and marginally acceptable target values. 4. Reflect on results and the process
上译克通大Establish Metrics and Uhits e SHANGHAI JIAO TONG UNIVERSITY 粱 Metric Imp Units 1 1,3 Attenuation from dropout to handlebar at 10hz 3 dB 2 2,6 Spring pre-load 3 N 3 1,3 Maximum value from the Monster 5 g 4 1,3 Minimum descent time on test track 5 心 5 4Damping coefficient adjustment range 3 N-s/m 6 5Maximum travel(26in wheel) 3 mm 7 5 Rake offset 3 mm 8 6 Lateral stiffness at the tip 3 kN/m 9 7Total mass 4 kg 10 8 Lateral stiffness at brake pivots 2 kN/m 11 9 Headset sizes 5 in 12 9 Steertube length 5 mm 13 9 Wheel sizes 5 list 14 9Maximum tire width 5 in 15 10Time to assemble to frame 1 s 16 11 Fender compatibility 1 list 17 12 Instills pride 5 subj 18 13 Unit manufacturing cost 5 US$ 19 14Time in spray chamber w/o water entry 5 S 20 15 Cycles in mud chamber w/o contamination 5k-cycles 21 16,17 Time to disassemble/assemble for maintenance 3 s 22 17,18 Special tools required for maintenance 3 list 23 19 UV test duration to degrade rubber parts 5 hours 24 19 Monster cycles to failure 5 cycles 25 20Japan Industrial Standards test 5 binary 26 20 Bending strength(frontal loading) 5 MN
Establish Metrics and Units