上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY > Problem complexity Problem may deal with parts: 1.Little state of the art parts:mostly common parts ·Bolts and Nuts ·Springs 2.State of the art parts:using advanced technology ·Turbine blades ·Engine parts 3.Parts with pioneering technology Camera lens installed in the Hubble space telescope Problem complexity : Problem may deal with parts: 1. Little state of the art parts: mostly common parts • Bolts and Nuts • Springs 2. State of the art parts: using advanced technology • Turbine blades • Engine parts 3. Parts with pioneering technology • Camera lens installed in the Hubble space telescope