Simulation Object Boundary Module (SOBM)
OOF™ Origin Open Foundation™
Independent Methodological Authority
Architecture Ecosystem: Structured Reality Standards™
Architecture Family: SIMULOS® — Simulation Governance Architecture
Parent Standard: Simulation Object Standard (SOS)
Operational Layer: Simulation Object Governance Layer
Category: Governance & Enforcement
Subcategory: Simulation Governance
Type: Parent Standard Module
Governed Space: Simulation Object Boundary
Version: 1.0
Status: Canonical · Open Module
Effective Date: 15 August 2026
Compatibility: OOF® Methodology OS™ · GOA™ · ORA™ · VALIDOS® · INTEGROS® · ADIT® · AGA™ ·
AIG® · CLIA® · MGIA™ · ASGA™ · RIS™
AI-Readable: Yes
Authority: OOF®
Protection: MIP® — Methodological Intellectual Property
Canonical Language: English (UCL™)
Governed Space
Simulation Object Boundary
Canonical Definition
Simulation Object Boundary Module (SOBM) defines the governance conditionsunder which the limits of an identified Simulation Object are formally
established, distinguished from surrounding systems, environments,
dependencies, actors, processes, interfaces, and external conditions, and
maintained as a traceable Simulation Object Boundary throughout downstream
simulation governance.
SOBM ensures that a simulation cannot silently expand, contract, or redefine
what belongs to the Simulation Object after its identity has been established.
Operational Role
SOBM serves as the second internal governance space of the Simulation ObjectStandard (SOS).
SOIM establishes:
What exactly is the Simulation Object?
SOBM asks:
Where does that Simulation Object begin and end, and what lies outside it?
The governed progression is:
Identified Simulation Object → Boundary Context → Included Elements → Excluded
Elements → Interfaces & Dependencies → Boundary Conditions → Boundary Status →
Governed Simulation Object Boundary
SOBM establishes the structural perimeter within which subsequent object
version, configuration, representation, assumptions, modeling, scenario,
execution, and output governance can operate.
Module Function
SOBM exists to prevent an identified Simulation Object from becomingstructurally ambiguous once simulation design begins.
Its function is to establish which elements are:
Inside the Simulation Object
Outside the Simulation Object
and:Connected Across the Simulation Object
Boundary
This distinction matters because simulation conclusions may change materiallydepending upon what the simulation treats as part of the object itself versus
part of its external environment.
SOBM therefore prevents: hidden boundary expansion, hidden boundary
contraction, omitted material components, uncontrolled inclusion of external
systems, environmental conditions being mistaken for object properties,
dependencies being absorbed into the object without disclosure, object
behavior being confused with external interaction, and simulation findings
being generalized beyond the established object boundary.
Simulation Object Boundary
A Simulation Object Boundary is the governed perimeter separating theSimulation Object from the external conditions, entities, systems, processes,
actors, and environments with which it may interact.
The boundary may be: physical, digital, logical, functional, organizational,
behavioral, spatial, temporal, operational, or composite.
A single Simulation Object may therefore require several mutually consistent
boundary dimensions.
Boundary Establishment
Once the Simulation Object has been identified through SOIM, its relevantboundaries must be established before downstream simulation structures depend
upon them.
Boundary establishment should answer:
What belongs to the object?
What does not belong to the object?
Which external elements materially interact with it?
Through which interfaces do those interactions occur?
Which boundary conditions materially affect simulation behavior?
The required precision depends upon the intended simulation.
Included Elements
An Included Element is an element treated as part of the Simulation Object forthe governed simulation.
Included elements may consist of: components, subsystems, software, hardware,
internal processes, internal actors, internal control mechanisms, internal
data structures, internal resources, or other constituent elements.
Inclusion must be sufficiently explicit where the element could materially
affect simulation interpretation.
Excluded Elements
An Excluded Element is an element intentionally outside the Simulation ObjectBoundary.
Exclusion does not mean irrelevance.
An excluded element may still influence the object through an external
interaction or dependency.
SOBM therefore distinguishes:
Outside the Object
from:Irrelevant to the Simulation
These are not equivalent.Boundary Interfaces
A Boundary Interface is a governed point through which the Simulation Objectinteracts with something outside its boundary.
Interfaces may include: data interfaces, physical connections, control
interfaces, communication channels, human interactions, resource inputs,
energy flows, sensor inputs, actuator outputs, organizational interactions, or
environmental interactions.
Boundary interfaces should remain identifiable where their behavior materially
affects simulation.
External Dependencies
A Simulation Object may depend upon entities that remain outside its boundary.Examples may include: cloud infrastructure, navigation systems, external
databases, communication networks, human operators, power systems, supply
chains, regulatory inputs, external AI services, or supporting infrastructure.
SOBM requires these dependencies to remain distinguishable from the Simulation
Object itself.
The existence of dependency does not automatically justify boundary inclusion.
Object Boundary vs Simulation Environment
SIMULOS® establishes a critical distinction:Simulation Object Boundary ≠ Simulation
Environment Boundary
The Simulation Object defines what is being simulated as the target.The Simulation Environment defines the conditions within which simulation
activity occurs.
For example:
Autonomous Drone
may be the Simulation Object.Urban Airspace + Weather + Navigation
Infrastructure + Other Aircraft
may form part of the simulated environment.Those concepts must not be collapsed merely because they interact during
simulation.
Object Boundary vs Reality Representation
SOBM establishes the boundary of the target object.It does not determine whether that boundary has been represented accurately
inside the simulation.
That later question belongs to the appropriate SIMULOS® Reality Representation
governance space.
Therefore:
Object Boundary = What belongs to the
target
while:Representation Boundary = What the
simulation representation actually models
A difference between the two may become a material simulation-governanceissue.
Functional Boundary
A Simulation Object may require a functional boundary specifying whichfunctions belong to the object being simulated.
For example, an autonomous vehicle simulation may include:
Perception
Planning
Decision
Vehicle Control
while an external navigation service remains outside the object.The boundary should preserve this distinction even where the systems operate
as one practical service.
Spatial Boundary
Where location or physical extent matters, the object may require a spatialboundary.
This may define: physical dimensions, geographic area, infrastructure extent,
operational zone, or another spatial perimeter.
Spatial boundaries should not be confused with the wider simulation
environment.
Temporal Boundary
A Simulation Object may also require a temporal boundary.The object represented at:
Time T1
may not be materially equivalent to the same nominal object at:
Time T2
where its relevant characteristics have changed.
Detailed version governance belongs to the appropriate SOS module, but SOBM
preserves the temporal perimeter relevant to the object definition.
Operational Boundary
An operational boundary identifies which operational functions, modes, states,or interactions belong to the Simulation Object for the particular simulation.
An object may have broader real-world capability than the operational portion
included within a simulation.
SOBM requires this difference to remain explicit.
Composite Object Boundary
Composite Simulation Objects require governance over the relationship between:Composite Boundary
and:Constituent Boundaries
For example:Autonomous Warehouse System
may contain:Robots + Control System + Internal Network
+ Charging Infrastructure
while:External Electrical Grid
remains outside the object boundary.SOBM preserves both the composite perimeter and relevant internal constituent
boundaries.
Nested Boundaries
Simulation Objects may contain nested boundaries.Conceptually:
System Boundary
↓Subsystem Boundary
↓Component Boundary
↓Functional Boundary
SOBM allows these boundaries to coexist where needed.A lower-level simulation claim must not automatically be represented as
applying to every higher-level boundary.
Boundary-Crossing Interaction
A Boundary-Crossing Interaction occurs whenever information, resources,commands, forces, signals, behaviors, or effects pass between the Simulation
Object and an external element.
Such interactions may materially influence simulation behavior even though the
external element remains outside the Simulation Object.
SOBM therefore requires material boundary-crossing interactions to remain
visible.
Boundary Conditions
A Simulation Object Boundary Condition defines a governed condition applyingat the interface between the object and its surroundings.
Examples may include: incoming data characteristics, resource availability,
communication latency, physical forces, environmental exposure, human
commands, external control signals, or other interface conditions.
Boundary conditions must not silently become assumed constants where
variability is material.
Boundary Assumptions
Where a boundary cannot be fully established from known information, aboundary assumption may be necessary.
SOBM requires such assumptions to remain explicit.
Detailed governance of the assumption itself belongs to the SIMULOS®
assumption-governance space.
SOBM preserves the fact that the object boundary depends upon that assumption.
Boundary Ambiguity
Simulation Object Boundary Ambiguity exists where it is unclear whether amaterially relevant element belongs inside or outside the Simulation Object.
Ambiguity may arise from: incomplete architecture records, unclear ownership,
dynamic system composition, external services, shared infrastructure,
distributed control, unclear subsystem relationships, or evolving operational
configurations.
Material ambiguity should not be silently resolved.
Boundary Conflict
A Boundary Conflict exists where credible sources define materially differentboundaries for the same Simulation Object.
For example:
one system architecture may include an external decision service within the
system boundary,
while another treats it as an external dependency.
Where the difference can affect simulation design or interpretation, the
conflict must remain visible until governed.
No Silent Boundary Expansion Rule
SIMULOS® establishes:A Simulation Object Boundary must not be expanded after simulation activity
begins without explicit governance of the change.
Adding new components, functions, populations, dependencies, or operational
modes may materially change the Simulation Object.
No Silent Boundary Contraction Rule
Likewise:Material elements may not be removed from the Simulation Object Boundary
without explicit governance of the exclusion.
A simulation must not obtain more favorable results by quietly removing
difficult or high-risk portions of the object.
No Environment Absorption Rule
An environmental element does not become part of the Simulation Object merelybecause it materially affects object behavior.
This rule protects the distinction between:
Object
and:
Environment
throughout the simulation lifecycle.
No Dependency Absorption Rule
A dependency does not automatically become part of the Simulation Objectmerely because the object cannot operate without it.
Dependency relationships must be visible.
Boundary inclusion requires an explicit basis.
No Boundary Inflation Rule
A simulation result established within one object boundary must notautomatically be represented as applying to a broader boundary.
Therefore:
Subsystem Simulation ≠ Whole-System
Simulation
Component Simulation ≠ Product Simulation
Single Operational Mode ≠ Complete
Operational Capability
unless a governed basis supports the broader claim.Boundary Change
A Simulation Object Boundary Change occurs when the governed perimeter of theobject changes materially.
Possible changes include:
Expansion
Contraction
Recomposition
Interface Change
Dependency Change
or:Boundary Reclassification
A boundary change may require downstream simulation governance to bereassessed.
Boundary Change Propagation
A material boundary change may affect: object version, configuration, realityrepresentation, assumptions, model structure, input requirements, scenarios,
execution, outputs, reality correlation, or simulation reliance.
SOBM therefore preserves boundary-change information for downstream governance
rather than determining all downstream consequences itself.
Boundary Continuity
Where the Simulation Object remains in use across multiple simulations, itsboundary should remain traceable between simulation cycles.
This enables comparison between:
Previous Simulation Object Boundary
and:Current Simulation Object Boundary
and prevents materially different simulation scopes from being treated asequivalent.
Boundary Equivalence
Two simulations may use different technical representations while stillconcern the same Simulation Object Boundary.
Conversely, two simulations using the same model may concern materially
different object boundaries.
SOBM therefore does not infer boundary equivalence from model similarity
alone.
Simulation Object Boundary Status
Possible boundary statuses may include:Established
Conditionally Established
Partially Established
Boundary Conflicted
Boundary Ambiguous
or:Boundary Undetermined
Boundary status describes the strength of the object-boundary basis.It does not establish simulation validity or operational reliance.
Simulation Object Boundary Record
SOBM should establish a persistent Simulation Object Boundary Recordsufficient to reconstruct what was considered inside, outside, and connected
to the Simulation Object when downstream simulation governance occurred.
The record may preserve: Simulation Object Identifier, boundary definition,
boundary dimensions, included elements, excluded elements, constituent
boundaries, external dependencies, boundary interfaces, boundary-crossing
interactions, boundary conditions, boundary assumptions, ambiguity, conflicts,
boundary status, boundary changes, and boundary traceability.
Failure Conditions
SOBM governance failure may exist where: the Simulation Object has nosufficiently defined boundary, material included elements are unidentified,
material exclusions remain hidden, object and environment are improperly
collapsed, dependencies are silently absorbed, material interfaces remain
unidentified, boundary-crossing interactions are omitted, boundary assumptions
remain hidden, conflicting boundaries are ignored, the object boundary is
silently expanded or contracted, subsystem results are represented as
whole-system results without sufficient basis, or downstream simulation
activity cannot be traced to the boundary under which it was performed.
Minimum Implementation Framework
1. Establish the Candidate Object BoundaryDetermine the physical, digital, logical, functional, spatial, temporal,
operational, organizational, or composite perimeter required for the
identified Simulation Object. 2. Classify Included, Excluded, and External
Elements
Establish which material elements belong inside the object, which are
explicitly excluded, and which remain external but relevant. 3. Identify
Interfaces, Dependencies, and Boundary Conditions
Map material relationships crossing the Simulation Object Boundary and
preserve conditions capable of affecting simulation behavior. 4. Resolve or
Record Boundary Ambiguity
Identify conflicts, assumptions, uncertain inclusions, exclusions, and
boundary limitations and assign the appropriate Simulation Object Boundary
Status. 5. Establish the Simulation Object Boundary Record
Preserve the governed boundary, material elements, interfaces, dependencies,
conditions, limitations, status, changes, and traceability required for
downstream simulation governance.
Governance Outputs
SOBM may produce: Simulation Object Boundary Record, Object BoundaryDefinition, Boundary Dimension Record, Included Element Register, Excluded
Element Register, External Element Register, Composite Object Boundary Record,
Constituent Boundary Map, Boundary Interface Register, External Dependency
Register, Boundary-Crossing Interaction Map, Boundary Condition Record,
Boundary Assumption Reference, Boundary Ambiguity Record, Boundary Conflict
Record, Simulation Object Boundary Status, Boundary Change Record, Boundary
Expansion Record, Boundary Contraction Record, Boundary Continuity Record,
Boundary Equivalence Assessment, and Simulation Object Boundary Traceability
Map.
Use Case 1 — Spacecraft Mission Simulation
ScenarioA space institution simulates a spacecraft operating during a lunar mission.
The spacecraft depends upon: ground-control infrastructure, navigation data,
communication networks, and mission-support systems.
Application
SOBM establishes the spacecraft and its defined onboard systems as the
Simulation Object.
Ground control, external communication infrastructure, lunar environment, and
navigation services remain outside the Simulation Object Boundary while their
material interfaces and dependencies remain explicitly represented. Result
Simulation findings cannot silently treat the entire mission ecosystem as if
it were part of the spacecraft itself.
The distinction between:
Spacecraft
External Infrastructure
and:Simulation Environment
remains traceable throughout downstream SIMULOS® governance. Use Case 2 —Autonomous Industrial Facility
Scenario
An organization simulates an autonomous warehouse containing robots, control
software, internal communications, charging systems, human workers, and
external cloud services. Application
SOBM establishes which elements form the governed Simulation Object.
The autonomous warehouse control system and designated robotic fleet may fall
inside the object boundary.
Human workers and external cloud services may remain outside the boundary
while their interactions with the system remain material simulation inputs and
interfaces. Result
The simulation cannot later be represented as covering the complete warehouse
ecosystem if only the autonomous control system and robotic fleet were
actually within the governed Simulation Object Boundary.
Architectural Position
Simulation Object Boundary Module (SOBM) is the second internal governancespace of the Simulation Object Standard (SOS).
The internal progression begins:
Simulation Object Identification →
Simulation Object Boundary
SOIM establishes:Which object is being simulated?
SOBM establishes:
What belongs to that object, what remains outside it, and where does the
object end?
Subsequent SOS modules may then govern the object's version, configuration,
and documentation against a sufficiently identified and bounded Simulation
Object.
SOBM does not replace governance of general governance boundaries under GOA™,
operational boundaries under ORA™, validation scope under VALIDOS®, integrity
under INTEGROS®, or autonomous-system constraints under ASGA™.
It governs specifically:
the boundary of the object that a simulation claims to represent.
Foundational Principle
A simulation claim cannot legitimately extend beyond the Simulation ObjectBoundary under which the simulation was governed and executed.