====== ENV-004i — Control Communication Conditions ======

[[dido:03-dido-te:99-annexes:annex-c-requirements:03-functional-requirements:03-01-test-environment-requirements:env-004-provide-deterministic-test-environment:start|Go to ENV-004 — Provide Deterministic Test Environment]]

===== Statement =====

The [[dido:99_annexes:annex-b-terms-and-definitions:d:dido-te|DIDO-TE]] SHALL control communication conditions in accordance with the applicable [[dido:99_annexes:annex-b-terms-and-definitions:t:test_definition|Test Definition]].

===== Derived From =====

  * [[dido:03-dido-te:99-annexes:annex-c-requirements:03-functional-requirements:03-01-test-environment-requirements:env-004-provide-deterministic-test-environment:start|ENV-004 — Provide Deterministic Test Environment]]
  * [[dido:03-dido-te:99-annexes:annex-b-references:dte-005|[DTE5] DIDO-TE Requirements Register]], source requirement identifier and obligation to be assigned
  * [[dido:03-dido-te:99-annexes:annex-b-references:dte-006|[DTE6] Structured Information Processing Reference Architecture (SIP-RA)]]
  * [[dido:03-dido-te:99-annexes:annex-b-references:dte-007|[DTE7] Federated Data Interpretation Systems Reference Architecture (FDIS-RA)]]

===== Rationale =====

Communication conditions influence message delivery, event ordering, synchronisation, availability, throughput, latency, and the behaviour of distributed [[dido:99_annexes:annex-b-terms-and-definitions:n:node|Nodes]].

Relevant conditions include latency, jitter, bandwidth, loss, duplication, corruption, reordering, interruption, routing, addressing, protocol behaviour, and connection state.

Uncontrolled differences in these conditions introduce environmental variation into a [[dido:99_annexes:annex-b-terms-and-definitions:t:test_execution|Test Execution]].

The applicable Test Definition distinguishes conditions requiring direct control from conditions requiring measurement and recording.

===== Applies To =====

  * [[dido:99_annexes:annex-b-terms-and-definitions:t:test_environment|Test Environment]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:t:test_definition|Test Definition]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:t:test_execution|Test Execution]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:t:test_object|Test Object]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:n:node|Node]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:t:test_resource|Test Resource]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:c:configuration|Configuration]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:c:constraint|Constraint]]
  * [[dido:99_annexes:annex-b-terms-and-definitions:e:evidence|Evidence]]

===== Verification =====

Verification confirms that:

  * The applicable Test Definition identifies each communication path that influences the Test Execution.
  * Each communication path has a unique identity.
  * Each communication path identifies its endpoints, interfaces, protocols, and applicable network boundaries.
  * The Test Definition specifies the required communication conditions for each path.
  * Each specified condition identifies its required value, range, state, or tolerance.
  * The DIDO-TE applies each required communication condition.
  * The DIDO-TE measures actual communication conditions during Test Execution.
  * The DIDO-TE detects conditions outside the specified tolerances.
  * The DIDO-TE records communication-path identities, configurations, measurements, changes, interruptions, and detected deviations as [[dido:99_annexes:annex-b-terms-and-definitions:e:evidence|Evidence]].
  * The DIDO-TE maintains [[dido:99_annexes:annex-b-terms-and-definitions:t:traceability|Traceability]] among each communication condition, the affected communication path, the Test Definition, the Test Execution, the Evidence, and the [[dido:99_annexes:annex-b-terms-and-definitions:t:test_result|Test Results]].
  * An unidentified, uncontrolled, unmeasured, unsupported, or untraceable communication condition constitutes nonconformance with this requirement.

Verification includes:

  * Inspection of the communication paths identified by the Test Definition
  * Inspection of endpoints, interfaces, protocols, network boundaries, and required communication conditions
  * Comparison of required and applied communication conditions
  * Measurement of communication conditions during Test Execution
  * A negative assessment using latency or jitter outside the specified tolerance
  * A negative assessment introducing loss, duplication, corruption, reordering, or interruption
  * Confirmation that the DIDO-TE detects and records each deviation
  * Inspection of communication Evidence and Traceability records
  * Confirmation that each negative assessment produces a nonconformance result

===== Referenced By =====

{{backlinks>.}}

===== Related Architecture Sections =====

  * Add links to the architecture sections governing communications, network control, fault injection, monitoring, Evidence, and Traceability.

===== Delivery Phase =====

Assign the applicable delivery phase.

===== Requirement Status =====

Draft

===== Statement Reference =====

Use the following syntax to reference this requirement’s Statement section from another DokuWiki page:

<code dokuwiki>
{{section>dido:03-dido-te:99-annexes:annex-c-requirements:02-test-environment-requirements:env-004-provide-deterministic-test-environment:env-004i-control-communication-conditions#Statement&noheader&nofooter&noeditbtn}}
</code>

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