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The systems engineering effort must be responsive to both the customer and the contractor interests. ducts Test Readiness Reviews and ensures that only
verified configuration items are integrated into the next
higher assembly for further verification. Verification is
continued to the system level, after which system
validation is conducted to prove compliance with user
Systems engineering also ensures that
concurrent engineering is properly applied through the
project life cycle by involving the required specialty
engineering disciplines. The SEMP is the guiding
document for these activities.
4.3 The Work Breakdown Structure A Work Breakdown Structure (WBS) is a
hierarchical breakdown of the work necessary to
complete a project. The WBS should be a
product-based, hierarchical division of deliverable items
and associated services. As such, it should contain the
project's Product Breakdown Structure (PBS), with the
specified prime product(s) at the top, and the systems,
segments, subsystems, etc. at successive lower levels.
At the lowest level are products such as hardware items,
software items, and information items (documents,
databases, etc.) for which there is a cognizant engineer
or manager. Branch points in the hierarchy should show
how the PBS elements are to be integrated. The WBS is
built from the PBS by adding, at each branch point of
the PBS, any necessary service elements such as
management, systems engineering, integration and
verification (I&V), and integrated logistics support (ILS).
If several WBS elements require similar equipment or
software, then a higher level WBS element might be
defined to perform a block buy or a development activity
(e.g., "System Support Equipment"). Figure 10 shows
the relationship between a .system. a PBS, and a WBS.
A project WBS should be carried down to the
cost account level appropriate to the risks to be
managed. The appropriate level of detail for a cost
account is det...
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