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Engineering Systems Integration
the important determinant for systems engineering. But for integration,
requirements have already been established. As such, integration concerns
how the requisite parts form a whole. When an object fails a test, it is the failure of the performance of a function. The first and driving thought is not that
a functional requirement is shown to have a degraded or out-of-specification
performance. Testing is but a small part of assessing the efficacy of integration. Testing needs to be done as an audit to determine what functions are
demonstrated to some level of proficiency; what rework is necessary to achieve
the requisite level of performance; what system behaviors reveal about the
intended uses of the deliverable system; and what areas of risk may impede
completing the product or service. Testing highlights the test object’s performance at a particular instance under certain conditions. The process of integrating objects provides opportunities to test the performances of additional
functions, each object showing its worth in transforming EMMI. Assessing a
system’s performance is more than an aggregation of discrete instances of
tests. The end-to-end assessment is indicative of combined demonstration of
transformed EMMI into an output that represents the totality of system
behaviors and enactments. Assessment of a system involves integration, testing, verification, and validation. Integration provides the sequencing of
objects to be tested. Testing indicates whether the functions are operative.
Verification and a Problem
Verification shows the mapping of the functions to the specifications, and
ultimately to solving the problem. That is the role of verification. Verification
is the means of establishing that the requisite functions of the product or
service have been provided. Verification is referenced to the specifications
that guided the engineering activities as well as the requirements which
guided the design and architecture. Integration concerns itself with answering the questions that plague engineers and systems engineers—how will
the performance requirements be met. Integration is more than simply providing object-to-object integration (i.e., providing functions). Integration
must also satisfy the performances that are required for each of the functions. Validation illustrates the limits of the performances of the design, system architecture, and implementation.
Integration and a Problem
Formulating a question requires that systems engineers who take responsibility for performing appropriate analyses act independently to make
necessary decisions, acknowledge perspective and context, and are accountable for the consequences of the question. That accountability is focused
on due diligence in preparing the integration plan, which results in the
questions that need to be asked and later in the answers. In addition, the
development of the integrated solution (or the answers to the questions
posed) must satisfy good engineering practice.
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