NOD-004a — Establish the Initial Node State

Go to NOD-004 — Control the Node Lifecycle

The DIDO-TE SHALL establish the initial state of each Node before initiating a Node lifecycle transition.

• NOD-004 — Control the Node Lifecycle
• [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)

The initial Node state provides the controlled starting point for subsequent lifecycle operations. It identifies the actual condition of the Node before the DIDO-TE starts, activates, suspends, resumes, stops, restarts, recovers, or terminates it.

The applicable Node Definition, Node Implementation, and Node Configuration determine the permitted initial states and the criteria for establishing them.

An unknown, ambiguous, unauthorized, or unsuitable initial state prevents the DIDO-TE from determining whether a requested lifecycle transition is valid. Residual processes, data, connections, locks, resources, or configuration from an earlier operation may also affect subsequent Test Execution.

Establishing and recording the initial state supports lifecycle control, reproducibility, fault isolation, recovery, Evidence, and Traceability.

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

Verification confirms that:

• The DIDO-TE uniquely identifies the Node before establishing its initial state.
• The Node Definition or Node Implementation identifies the permitted initial states.
• The DIDO-TE uses identified and authorized criteria and procedures to determine the initial Node state.
• The DIDO-TE observes the actual Node state rather than relying solely on an intended or previously recorded state.
• The DIDO-TE identifies active processes, services, connections, bindings, resources, and applicable persistent data associated with the Node.
• The DIDO-TE identifies residual Node activity or state from an earlier operation.
• The DIDO-TE confirms that the initial Node state satisfies the applicable Node Definition, Node Implementation, Node Configuration, Test Definition, and Test Environment constraints.
• The DIDO-TE detects an unknown, ambiguous, conflicting, unauthorized, or unsuitable initial Node state.
• The DIDO-TE prevents a lifecycle transition when the initial Node state does not satisfy the transition preconditions.
• The DIDO-TE identifies the corrective or recovery action required when the initial Node state is unsuitable.
• The DIDO-TE records the Node identity, observed state, applicable criteria, procedure, authority, time, findings, exceptions, and resulting status.
• Repeated determination of an unchanged initial Node state under equivalent conditions produces an equivalent result.
• The DIDO-TE maintains Traceability among the Node Definition, Node Implementation, Node Configuration, Test Definition, Test Environment, observed initial state, findings, exceptions, and resulting Evidence.
• An unknown, ambiguous, unauthorized, unsuitable, incorrectly determined, or untraceable initial Node state constitutes nonconformance with this requirement.

Verification includes:

• Inspection of the Node identity
• Inspection of permitted initial states and transition preconditions
• Inspection of the authorized state-determination criteria and procedure
• Observation of the actual Node state
• Inspection of active processes, services, connections, bindings, resources, and persistent data
• A negative assessment involving an unknown initial state
• A negative assessment involving residual activity from an earlier operation
• Confirmation that an unsuitable initial state prevents a lifecycle transition
• Inspection of findings, exceptions, recovery actions, Evidence, and Traceability

• Add links to the architecture sections governing Node lifecycle states, lifecycle transitions, Node Configuration, Test Environment control, recovery, Evidence, and Traceability.

Assign the applicable delivery phase.

Draft

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