1726
This involves structural optimization and uses an iterative process of simulation and material removal to optimize the required material distribution or material stiffness for a given set of expected load cases .
 concept or principle: structural optimization; concept or principle: process; enabling technology: simulation; material: material; material: material; concept or principle: distribution; engineering feature: material stiffness; application: set
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: structural optimization; concept or principle: process; enabling technology: simulation; material: material; material: material; concept or principle: distribution; engineering feature: material stiffness; application: set