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A cost model for estimating the manufacturing cost of a build task using selective laser melting is proposed in a cost estimation .
 concept or principle: cost model; concept or principle: manufacturing cost; process parameter: build; manufacturing process: selective laser melting; concept or principle: cost estimation
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: cost model; concept or principle: manufacturing cost; process parameter: build; manufacturing process: selective laser melting; concept or principle: cost estimation