part
something less than the whole of a human artifact
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a physical part of a human artifact, assess its fitness for its role, and determine justified actions affecting the part and its whole.
something less than the whole of a human artifact
It can be Identify the part and locate its boundary and position relative to a specified artifact.; Inspect or measure the part against requirements for its role and interfaces.; Assess compatibility with a proposed installation or replacement candidate.; Determine prerequisites and consequences of installing, securing, removing, or replacing it.; Select justified repair, reuse, restriction, or retirement actions using recorded evidence..
Distinguishing features
A containing, intended, or previous human artifact can be named, and the candidate is physically less than that artifact.
The candidate has an identifiable physical extent within the artifact; a purely functional label without a physical referent is insufficient.
Part status is relative to a stated whole: a motor may be a complete artifact in one assessment and a part of a pump in another.
Being nearby, packaged with, or used on an artifact does not by itself establish that the candidate is one of its parts.
A part designation identifies a design or class, while this model must distinguish that designation from the physical instance being assessed.
Scope
+ The physical extent of a part and the artifact relative to which it is less than the whole
+ The distinction between a particular part, its part designation, and other instances of the same design
+ The contribution the part makes to the containing artifact
+ Interfaces, fit, attachment, and dependencies on neighbouring parts
+ Condition and fitness for a specified installation or use
+ Installation, removal, repair, replacement, and reuse constraints
- The containing artifact's complete purpose, architecture, and overall operating state
- Raw material stocks without an identified artifact-part role
- Abstract portions of documents, software, plans, or other nonphysical artifacts
- Manufacturing and maintenance processes as independently managed activities
- Tools and equipment used to work on the part
- Commercial offers, purchase orders, and inventory management beyond identifying the physical part
Characteristics
- Reference whole
- Identified artifact; relation marked as installed in, intended for, formerly part of, or uncertain Establishes the whole against which part status and role are judged.
- Physical boundary basis
- Separable component, joined component, integral region, or unresolved Determines what is included and whether removal can preserve the part and surrounding artifact.
- Part designation and revision
- Applicable drawing, part number, revision, variant, or unknown Supports identification while preventing visually similar variants from being treated as interchangeable.
- Role in the whole
- Named contribution to a specified artifact function or structural requirement Makes fitness and the consequences of absence assessable.
- Interface dimensions
- Interface-specific dimensions and tolerances in stated units Provides evidence for physical fit at the actual mating surfaces.
- Attachment state
- Detached, positioned, partially attached, secured, or unknown Distinguishes presence from completed installation.
- Role-relative fitness
- Unassessed, fit for stated conditions, restricted, unfit, or indeterminate Connects observed condition to a particular use rather than assigning universal serviceability.
- Interface degradation
- Observed wear, deformation, corrosion, clearance, or other relevant quantity with method and units Captures deterioration that can compromise mating, retention, alignment, or transfer.
- Replacement compatibility
- Candidate-to-installation relation: verified, conditional, incompatible, or unverified Prevents a shared name or nominal size from being sufficient grounds for substitution.
Analytical facets
- substance
- material
- origin
- manufactured
- agency
- inert
- mobility
- portable
- scale
- handheld
- affordances
- graspable
Also called
+257
Where this came from
oewn:2024 · CC BY 4.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 10 layers · 10 findings · 20 questions.
Part identity and boundary Establishes which physical thing is being assessed and why it counts as part of a particular artifact.
Part identity depends on a whole-relative boundary, and cannot be established by an object name alone.
Whole-relative identity
Locates the part in an explicit artifact relationship and level of decomposition.
Reference whole and position
Record the artifact that supplies the reference whole and the part's actual, intended, or previous position within it.
- Relative to which human artifact is this candidate less than the whole? definition
- What evidence establishes its installed, intended, or former relationship to that artifact? provenance
Physical and instance boundaries
Separates the assessed physical instance from adjacent material, nested parts, and design identifiers.
Included extent and identifiers
Record the included material or components, boundary evidence, and identifiers that distinguish the instance from its design class.
- Which surfaces, joints, or explicitly defined limits separate this part from neighbouring parts and the rest of the artifact? boundary
- Which markings or records identify this physical instance, and which identify only its design or revision? provenance
Contribution and dependencies Connects the part to the work, structure, or other requirement it supports in the whole.
A part's significance and fitness depend on its contribution and on what relies on that contribution.
Assigned contribution
States why this part is present in the specified artifact.
Role and required performance
Record the part's contribution and the requirements that make that contribution adequate.
- What does this part support, locate, contain, protect, transmit, transform, or otherwise contribute in this artifact? definition
- Which measurable or observable requirements establish that this contribution is adequate? measurement
Dependency and absence
Identifies neighbouring dependencies and consequences of losing the part's contribution.
Effects of loss or removal
Record what depends on this part and what must change if it fails or is removed.
- Which other parts or artifact functions depend on this part for support, retention, alignment, sealing, or transfer? boundary
- What restrictions or temporary provisions are required before the artifact can remain in use with this part absent or ineffective? action
Interfaces and installation Describes how the part fits, connects, and becomes correctly installed in the whole.
A sound part can still be unsuitable or ineffective because its interfaces or installation are wrong.
Mating and transfer
Defines the interfaces through which the part meets or interacts with neighbouring parts.
Interface requirements
Record mating counterparts and the geometric or transfer conditions required at each relevant interface.
- Which surfaces, connectors, passages, or contact regions mate with which neighbouring parts? boundary
- Which dimensions, tolerances, alignment limits, or transfer ratings must be checked at those interfaces? measurement
Attachment and verification
Distinguishes placement from secure and verified installation.
Installed state evidence
Record orientation, attachment completion, and evidence that installation requirements have been met.
- What evidence establishes the required orientation, seating, engagement, and attachment completion? provenance
- Which installation checks or adjustments are required before this part may perform its role? action
Condition and role fitness Relates observed degradation and service exposure to the part's required contribution.
Condition must support a decision about this part in this role, including defects hidden by installation.
Degradation at critical regions
Locates damage or deterioration where it can affect the part's contribution or interfaces.
Condition evidence and coverage
Record relevant observations, their locations, and regions that could not be assessed.
- What wear, cracking, deformation, corrosion, looseness, or other role-relevant degradation has been observed, and where? measurement
- Which critical surfaces or internal regions remain unexamined because of installation or inspection limits? boundary
Serviceability decision
Connects condition and exposure evidence to acceptance criteria for a specified use.
Fitness under stated conditions
Record the basis for accepting, restricting, rejecting, or deferring judgment on the part.
- Which applicable acceptance limits and service-history records support the fitness judgment for this installation? provenance
- Given observed condition and missing evidence, may this part remain in service, require further inspection, or need removal? action
Intervention and substitution Supports decisions about removing, repairing, replacing, and reusing the part.
Intervening on a part changes relationships within the whole, and nominally matching replacements may not preserve its contribution.
Removal and repair
Identifies feasible interventions and their effects on the part and neighbouring structure.
Intervention prerequisites and effects
Record access needs, dependency controls, and whether intervention preserves the relevant boundaries and interfaces.
- What access, disassembly, isolation, or temporary support is required before this part can be removed or repaired? action
- Would the intervention consume attachments, alter mating surfaces, or destroy an integral boundary that must subsequently be restored? boundary
Replacement and reuse
Evaluates a specific candidate part for a specific receiving artifact.
Substitution evidence and release
Record compatibility evidence and the checks needed to accept a replacement or reused part.
- What evidence shows that the candidate's revision, interfaces, performance, and condition satisfy the receiving artifact's requirements? provenance
- Which adjustments, paired replacements, or post-installation checks are required before accepting this substitution? action
What the second pass must settle
- Does the registry include arbitrary spatial portions of an artifact, or require a recognised component or explicitly designated integral region?
- How should the registry distinguish artifact parts from coatings, adhesives, lubricants, and other incorporated or replenished substances?
- When does a detached fragment cease to be the original part and become debris, material, or a newly identified part?
- What evidence is sufficient to classify an uninstalled spare as an artifact part when no individual receiving artifact has been selected?
- What identity rules should apply when repair replaces most of a part's material or when a nested assembly is assessed at multiple levels?