NOD-004b — Start the Node

Go to NOD-004 — Control the Node Lifecycle

The DIDO-TE SHALL start each Node through an identified and authorized lifecycle procedure.

• NOD-004 — Control the Node Lifecycle
• NOD-004a — Establish the Initial Node State
• [DTE5] DIDO-TE Requirements Register, source requirement identifier and obligation to be assigned
• [DTE6] Structured Information Processing Reference Architecture (SIP-RA)
• [DTE7] Federated Data Interpretation Systems Reference Architecture (FDIS-RA)

Starting a Node moves it from an established initial state into an operating state from which the DIDO-TE determines readiness for participation in a Test Environment.

A controlled start operation applies the sequence, parameters, dependencies, authorities, time constraints, and environmental conditions specified by the Node Definition, Node Implementation, Node Configuration, and applicable Test Definition.

Starting a Node does not by itself establish Node readiness. The start operation establishes the operating condition that NOD-004c evaluates before the Node participates in Test Execution.

An uncontrolled, incomplete, unauthorized, duplicate, or out-of-sequence start may produce an unknown Node state, activate unintended services or connections, disrupt dependent Nodes, or compromise Test Environment isolation.

• DIDO-TE
• Node
• Node Definition
• Node Implementation
• Node Configuration
• Node Binding
• Dependency
• Test Definition
• Test Environment
• Test Resource
• Test Execution
• Evidence
• Traceability

Verification confirms that:

• The DIDO-TE uniquely identifies the Node before starting it.
• The DIDO-TE confirms that the Node occupies a permitted initial state.
• The DIDO-TE uses an identified and authorized start procedure.
• The start operation identifies the initiating authority, target Node, start parameters, applicable preconditions, and intended resulting state.
• The DIDO-TE verifies each mandatory start precondition before initiating the start operation.
• The DIDO-TE verifies the availability of each Dependency, Node Binding, service, and Test Resource required during startup.
• The DIDO-TE starts dependent Nodes and services in the required sequence.
• The DIDO-TE applies the Node Configuration and startup parameters associated with the authorized start operation.
• The DIDO-TE prevents duplicate, conflicting, unauthorized, or out-of-sequence start operations.
• The DIDO-TE observes the Node during the start operation.
• The DIDO-TE detects an unsuccessful, incomplete, interrupted, stalled, or timed-out start operation.
• The DIDO-TE detects an unexpected process, service, connection, Node Binding, error, or state transition during startup.
• The DIDO-TE confirms the actual Node state after the start operation.
• The DIDO-TE distinguishes completion of the start operation from confirmation of Node readiness.
• An unsuccessful start leaves the Node in a known state or identifies the resulting state and required recovery action.
• The DIDO-TE prevents a Node with an unsuccessful, incomplete, unauthorized, or ambiguous start result from participating in Test Execution.
• The DIDO-TE records the Node identity, initiating authority, start procedure, parameters, source state, operations, timing, actual resulting state, findings, exceptions, and recovery actions.
• Repeated authorized starts from equivalent initial conditions produce equivalent resulting states within specified tolerances.
• The DIDO-TE maintains Traceability among the Node Definition, Node Implementation, Node Configuration, Node Bindings, Dependencies, start procedure, start activity, resulting state, findings, exceptions, and resulting Evidence.
• An incorrect, incomplete, unsuccessful, unauthorized, ambiguous, or untraceable start operation constitutes nonconformance with this requirement.

Verification includes:

• Inspection of the Node identity and initial state
• Inspection of the authorized start procedure and responsible authority
• Inspection of start preconditions, parameters, Dependencies, Node Bindings, services, and Test Resources
• Observation of the start sequence
• Observation of the Node during startup
• Confirmation of the actual resulting Node state
• A negative assessment involving an unauthorized start
• A negative assessment involving an unavailable mandatory Dependency
• A negative assessment involving an interrupted or timed-out start
• Confirmation that an unsuccessful start prevents Test Execution
• Confirmation that startup completion does not automatically establish Node readiness
• Inspection of start records, findings, exceptions, recovery actions, Evidence, and Traceability

• Add links to the architecture sections governing Node startup, Node lifecycle states, Node Configuration, Node Bindings, Dependencies, readiness, recovery, Evidence, and Traceability.

Assign the applicable delivery phase.

Draft

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