Specification Tree

Specification Tree

A specification tree shows all specifications of a technical system under development in a hierarchical order.

For a spacecraft system it has the following levels:

  • System (requirements) specification - generated by customer
    • System (design to) specification - generated by system responsible prime contractor
      • Subsystem specifications - generated by system responsible prime contractor
        • Assembly¹ specifications - generated by subsystem responsible contractors
          • Unit specifications - generated by subsystem (or assembly) responsible contractors.

¹ An assembly level is defined as intermediate level when the subsystem contractor prefers to contract a group of units with complex interfaces to another contractor (for instance the operating system and subsystem application software can be an assembly of the data management subsystem).

Read more about Specification Tree:  See Also

Other articles related to "specification tree, specification":

System Requirements (spacecraft System) - Specification Tree
... The spacecraft system specification defines also the subsystems of the spacecraft e.g ... For each subsystem a subsystem specification is prepared by the Prime Contractor with the same specification structure shown above including references to ... same way the subsystem contractor prepares an assembly or unit specification ...

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