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Design And Design Elements

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Stakeholders will provide the necessary documentation to create Parent Requirements, that are then analyzed and used to create the Performance Specification (PSPEC). Design artifacts can be created from the parent requirements and PSPEC. Design artifacts are created in an effort to assist the identification of all the necessary components pertinent to satisfying said requirements. Design artifacts also identify interfaces and support the development of product behaviors, data models, and other design aspects. Design artifacts include block diagrams, system functional architecture, and activity diagrams. Non-diagram artifacts include trade studies, performance models, and design handbooks. These design artifacts are then utilized to create …show more content…

They differ at which module level the requirement is derived, or if the requirement is derived within the module at all. The three methods are listed below.

1) Derivation of a requirement at a lower level in the module.
2) Allocation of a requirement to the lower level module, then deriving it in that module.
3) Deriving the requirement over the link between modules

While the definition of derived and allocated requirements may differ on a case-by-case, program-by-program basis, the following definitions are applicable for Textron Systems Unmanned Systems [10]:
Allocation: Assigning a requirement to a specific context such as a capability, use case, interface, subsystem, hardware configuration item or software configuration item.
Derived Requirement: Detailed characteristics of the system of interest (SOI) or element decomposed from a parent requirement that typically is identified during elicitation of stakeholder requirements, requirements analysis, trade studies, or validation.
A benefit of methods 1 and 3 is the order of derivation and allocation. Derivation allows for the identification of the SOI, and the characteristics pertinent to it. This information will assist in identifying which level the requirement should be allocated to. Because method 2 is allocate first, then derive, a requirement may be allocated at too high or low of a level. The benefit of implementing method three is that since the requirement is derived over the link, there are no repeated

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