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.
- Assembly¹ specifications - generated by subsystem responsible contractors
- Subsystem specifications - generated by system responsible prime contractor
- System (design to) specification - generated by system responsible prime contractor
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
Famous quotes containing the word tree:
“Some say that happiness is not good for mortals, & they ought to be answered that sorrow is not fit for immortals & is utterly useless to any one; a blight never does good to a tree, & if a blight kill not a tree but it still bear fruit, let none say that the fruit was in consequence of the blight.”
—William Blake (1757–1827)