A controls and avionics concept defining sensing, computation, and actuation used to guide, navigate, and control vehicles in air or space. It governs data acquisition, estimation, control logic, and fault handling needed to meet stability and mission objectives. It does not provide safe control without validated software, robust redundancy, and appropriate integrity monitoring. It materially affects safety and mission success by determining guidance accuracy, stability margins, and automation performance. The concept is generally stable, though architectures and computational methods evolve over time.

Principle

Provide unambiguous, executable instructions that enable different operators to run the same test and produce comparable, auditable results while preserving safety controls and traceability to the parent test plan and requirements.

Demonstration

Example: an HIL procedure listing required hardware-in-the-loop rack configuration, software build ID, sensor calibration steps, actuator drive limits, a sequence of stick and autopilot commands, the exact logging channels and sample rates, emergency abort criteria, and post-test data archival steps.

Misapplication

Creating overly terse procedures that omit critical setup or safety steps, or over-prescriptive scripts that prevent competent operators from taking necessary corrective actions during an anomalous event.

Consequence

Clear procedures enable reproducible execution, reduce human error, protect test assets and personnel, and ensure that collected data can be reliably interpreted against acceptance criteria.

Reversal

A “procedure” that only states objectives or high-level scenarios without concrete execution steps leaves execution ambiguous and non-reproducible.

Boundary

Applies specifically to test execution for a defined test case or series of cases; it does not replace the test plan (which establishes scope) nor the test report (which records outcomes and analysis).

Semantic Tension

Often confused with checklists or maintenance procedures; a test procedure must include the stimuli, measurement capture, and pass/fail logic that uniquely define a test case rather than general equipment checks.

Synthesis

A deterministic set of execution steps, safety checkpoints and logging instructions that make a single flight control law test case repeatable, safe and auditable.