ISO 10303-214:2010(E)
A Promissory_usage is a relationship between a constituent of an assembly and the assembly itself. The relationship describes the intention to use the constituent in an assembly.
NOTE There may not be any geometric information provided for the constituent or the assembly that are associated by a Promissory_usage.
EXAMPLE In early design stages, the Promissory_usage may be used to create preliminary BOMs for prototyping.
A Promissory_usage is a type of Assembly_component_relationship.
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