Architecture Modeling - SPES 2020

Architecture Modeling
the one given above in Sec. 6.3.1. Though, logically, nothing is assured of a component if the
strong assumption is violated, we still can compose it in parallel with other components without
affecting those — such is the nature of “parallelism as intersection”. If this is not justified,
the strong VIT condition would become mandatory, to preclude conclusions to be drawn from
the specifications of some components even though the operational conditions of others are not
met. Building a semantics on a concept (parallelism as intersection) which does not always hold
might seem badly advised. But one should bear in mind that all mathematical semantics of realworld
entities are simplifications. And the concept of “very strong” assumptions, as reflected
in the “Strong VIT condition” might enable a consistent use of helpful simplifications which
would otherwise be unsound. Handling the large formulas in (6.4) and (6.6) might be difficult
in practice – tautology checking for trace logics is computationally expensive. Thus, to reduce
the complexity, boolean reasoning should be used first to reduce the problem. A promising way,
to be supported by adequate methodological guidelines, is to eliminate assumptions wherever
possible when they are implied by commitments of other components as exemplified in Sec. 4.
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