Industrial method qualification and applicability

NeqSim separates successful calculation from qualification for a particular engineering service. A converged result, an internal regression test and a project approval record answer different questions and must not be treated as interchangeable evidence.

EngineeringMethodQualificationRegistry evaluates the exact method@version against four independent controls:

  1. the qualification record is complete and approved;
  2. an independently reviewed, non-regression benchmark qualifies the same method version;
  3. the requested use is explicitly included; and
  4. supplied project-service inputs are within a structured applicability envelope.

The result is machine-readable and can report QUALIFIED_FOR_SERVICE, UNREGISTERED_METHOD, INCOMPLETE_QUALIFICATION, MISSING_INDEPENDENT_BENCHMARK, USE_NOT_QUALIFIED, INSUFFICIENT_SERVICE_CONTEXT or OUTSIDE_QUALIFIED_ENVELOPE.

Numeric regression health is intentionally reported separately from qualification. An EngineeringBenchmarkSuite.Report exposes areAllBenchmarksPassed() and getFailedBenchmarkIds() for executable baseline checks, while isPassed() continues to require a passing independently reviewed, non-regression benchmark for every required exact method version. This prevents a green internal regression suite from being presented as independent engineering qualification.

Define and assess a method

EngineeringMethodApplicabilityEnvelope envelope =
    new EngineeringMethodApplicabilityEnvelope("gas-pressure-drop", "A")
        .requireInput("compositionBasis")
        .numericRange("pressure", "bara", 1.0, 150.0)
        .numericRange("temperature", "K", 250.0, 400.0)
        .allowedValues("phase", "GAS")
        .knownLimitation("Not qualified for two-phase service")
        .uncertaintyBasis("INDEPENDENT-CALC-21 uncertainty budget, revision A")
        .prohibitExtrapolation(true);

EngineeringMethodQualification qualification =
    new EngineeringMethodQualification("gas-method", "2.1",
        EngineeringMethodQualification.Level.PROJECT_QUALIFIED)
        .addStandardReference("PROJECT-METHOD-BASIS-A")
        .addApplicabilityLimit("Structured envelope gas-pressure-drop revision A")
        .addEvidenceReference("INDEPENDENT-CALC-21")
        .approve("Technical authority / APPROVAL-21")
        .applicabilityEnvelope(envelope)
        .qualifyFor(EngineeringMethodQualification.IntendedUse.FEED_SUPPORT)
        .addAcceptanceCriterion("pressureDrop", "bar", 0.05, 0.01);

EngineeringMethodServiceContext service =
    new EngineeringMethodServiceContext(EngineeringMethodQualification.IntendedUse.FEED_SUPPORT)
        .numericValue("pressure", 80.0, "bara")
        .numericValue("temperature", 300.0, "K")
        .categoricalValue("phase", "GAS")
        .suppliedInput("compositionBasis");

EngineeringMethodQualificationRegistry registry =
    new EngineeringMethodQualificationRegistry("project-methods", "A").register(qualification);

EngineeringMethodQualificationRegistry.Result assessment =
    registry.assess("gas-method@2.1", service, independentBenchmarkReport);

Attach the registry and every executed-method assessment to EngineeringProductionReadinessBasis. Activating the registry adds the fail-closed INDUSTRIAL_METHOD_APPLICABILITY readiness gate: every method executed by the final design iteration must have a qualifying assessment for its actual service.

Interpretation boundaries