ISCO-08 8211
Mechanical machinery assemblers
7.5%
ADI · 376th of 433 · 95% interval 0.0–19.3
An AI agent can at least partly carry out 7.5% of the task time of mechanical machinery assemblers, and finish 0.0% alone. Most of the rest requires physical presence.
ADI · partial or full7.5%
376th of 433 · interval 0.0–19.3
ADI3 · full delegation0.0%
201st of 433 · interval 0.0–0.0
ADIs · share of time13.6%
373rd of 433 · interval 8.8–19.5
Evidence39
task statements rated by two models and weighted by importance and frequency. World employment: 1.5 million.
Task weight by level
How the tasks rate
L0No meaningful role · 68.8%L1Augmentation · 23.6%L2Partial delegation · 7.6%L3Full delegation · 0.0%
Barriers
What stops the agent
Share of task weight flagged by each barrier; a task can carry several.
39 task statements, heaviest first
| Task statement (O*NET occupation) | Sonnet · Haiku | Barriers | ||||
|---|---|---|---|---|---|---|
| Read and interpret assembly blueprints or specifications manuals, and plan assembly or building operations.Engine and Other Machine Assemblers | 5.2% | L2 | L2L2 | 60% | 1.1 h | Access to systems |
| Position or align components for assembly, manually or using hoists.Engine and Other Machine Assemblers | 5.0% | L0 | L0L0 | 4% | 18 min | Physical presence |
| Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment.Engine and Other Machine Assemblers | 4.6% | L0 | L0L0 | 4% | 1.0 h | Physical presence, Access to systems |
| Set and verify parts clearances.Engine and Other Machine Assemblers | 4.5% | L1 | L1L1 | 16% | 38 min | Physical presence, Access to systems |
| Verify conformance of parts to stock lists or blueprints, using measuring instruments such as calipers, gauges, or micrometers.Engine and Other Machine Assemblers | 4.5% | L1 | L1L1 | 20% | 25 min | Physical presence, Accountability, Access to systems |
| Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications.Engine and Other Machine Assemblers | 4.3% | L1 | L1L1 | 18% | 52 min | Physical presence, Accountability, Access to systems |
| Remove rough spots and smooth surfaces to fit, trim, or clean parts, using hand tools or power tools.Engine and Other Machine Assemblers | 4.2% | L0 | L0L0 | 4% | 18 min | Physical presence |
| Maintain and lubricate parts or components.Engine and Other Machine Assemblers · supplemental task | 3.9% | L0 | L0L1 | 9% | 25 min | Physical presence, Accountability, Access to systems |
| Lay out and drill, ream, tap, or cut parts for assembly.Engine and Other Machine Assemblers | 3.8% | L0 | L1L0 | 10% | 38 min | Physical presence |
| Rework, repair, or replace damaged parts or assemblies.Engine and Other Machine Assemblers | 3.7% | L0 | L0L2 | 18% | 1.1 h | Physical presence, Accountability |
| Set up and operate metalworking machines, such as milling or grinding machines, to shape or fabricate parts.Engine and Other Machine Assemblers · supplemental task | 3.2% | L1 | L1L2 | 21% | 1.5 h | Physical presence, Access to systems |
| Assemble systems of gears by aligning and meshing gears in gearboxes.Engine and Other Machine Assemblers · supplemental task | 3.1% | L0 | L0L1 | 6% | 45 min | Physical presence |
| Assemble parts, fittings, or subassemblies on aircraft, using layout tools, hand tools, power tools, or fasteners, such as bolts, screws, rivets, or clamps.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.7% | L0 | L0L1 | 8% | 2.8 h | Physical presence, Accountability, Access to systems |
| Read blueprints, illustrations, or specifications to determine layouts, sequences of operations, or identities or relationships of parts.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.4% | L2 | L2L2 | 58% | 38 min | Physical presence, Access to systems |
| Attach brackets, hinges, or clips to secure or support components or subassemblies, using bolts, screws, rivets, chemical bonding, or welding.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.3% | L0 | L0L1 | 6% | 38 min | Physical presence, Accountability, Access to systems |
Show the other 24 tasks
| Task statement (O*NET occupation) | Sonnet · Haiku | Barriers | ||||
|---|---|---|---|---|---|---|
| Inspect or test installed units, parts, systems, or assemblies for fit, alignment, performance, defects, or compliance with standards, using measuring instruments or test equipment.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.2% | L1 | L1L1 | 18% | 42 min | Physical presence, Accountability, Access to systems |
| Adjust, repair, rework, or replace parts or assemblies to ensure proper operation.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.2% | L0 | L0L1 | 8% | 1.3 h | Physical presence, Accountability, Access to systems |
| Cut, trim, file, bend, or smooth parts to ensure proper fit and clearance.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.2% | L0 | L0L0 | 4% | 38 min | Physical presence, Accountability |
| Clean, oil, or coat system components, as necessary, before assembly or attachment.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.1% | L0 | L0L1 | 7% | 25 min | Physical presence, Accountability, Access to systems |
| Assemble prefabricated parts to form subassemblies.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.0% | L0 | L0L1 | 6% | 2.0 h | Physical presence, Accountability, Access to systems |
| Align, fit, assemble, connect, or install system components, using jigs, fixtures, measuring instruments, hand tools, or power tools.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 2.0% | L0 | L0L0 | 4% | 2.0 h | Physical presence, Accountability, Access to systems |
| Clean aircraft structures, parts, or components, using aqueous, semi-aqueous, aliphatic hydrocarbon, or organic solvent cleaning products or techniques to reduce carbon or other harmful emissions.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 2.0% | L0 | L0L1 | 9% | 45 min | Physical presence, Accountability, Access to systems |
| Fabricate parts needed for assembly or installation, using shop machinery or equipment.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 2.0% | L0 | L0L1 | 12% | 1.5 h | Physical presence, Accountability, Access to systems |
| Layout and mark reference points and locations for installation of parts or components, using jigs, templates, or measuring and marking instruments.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | 1.9% | L0 | L0L1 | 12% | 1.0 h | Physical presence, Accountability, Access to systems |
| Position and align subassemblies in jigs or fixtures, using measuring instruments and following blueprint lines and index points.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.9% | L0 | L0L1 | 12% | 1.1 h | Physical presence, Accountability, Access to systems |
| Set, align, adjust, or synchronize aircraft armament or rigging or control system components to established tolerances or requirements, using sighting devices and hand tools.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.9% | L0 | L0L0 | 4% | 1.5 h | Physical presence, Accountability, Access to systems |
| Join structural assemblies, such as wings, tails, or fuselage.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.9% | L0 | L0L0 | 4% | 3.0 h | Physical presence, Accountability, Access to systems |
| Set up or operate machines or systems to crimp, cut, bend, form, swage, flare, bead, burr, or straighten tubing, according to specifications.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.8% | L1 | L1L1 | 18% | 45 min | Physical presence, Accountability, Access to systems |
| Capture or segregate waste material, such as aluminum swarf, machine cutting fluid, or solvents, for recycling or environmentally responsible disposal.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.7% | L0 | L0L0 | 4% | 25 min | Physical presence, Accountability, Access to systems |
| Manually install structural assemblies or signal crane operators to position assemblies for joining.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.6% | L0 | L0L1 | 6% | 1.8 h | Physical presence, Accountability, Access to systems |
| Mark identifying information on tubing or cable assemblies, using etching devices, labels, rubber stamps, or other methods.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.6% | L1 | L1L1 | 10% | 10 min | Physical presence, Accountability, Access to systems |
| Weld tubing and fittings or solder cable ends, using tack welders, induction brazing chambers, or other equipment.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.6% | L0 | L0L0 | 4% | 45 min | Physical presence, Accountability, Access to systems |
| Fit and fasten sheet metal coverings to surface areas or other sections of aircraft prior to welding or riveting.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.5% | L0 | L0L0 | 4% | 1.8 h | Physical presence, Accountability, Access to systems |
| Place and connect control cables to electronically controlled units, using hand tools, ring locks, cotter keys, threaded connectors, turnbuckles, or related devices.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.4% | L0 | L0L1 | 9% | 45 min | Physical presence, Accountability, Access to systems |
| Install mechanical linkages and actuators, using tensiometers to verify tension of cables.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.4% | L0 | L0L1 | 8% | 1.5 h | Physical presence, Accountability, Access to systems |
| Verify dimensions of cable assemblies or positions of fittings, using measuring instruments.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.4% | L1 | L1L1 | 20% | 30 min | Physical presence, Accountability, Access to systems |
| Cut cables and tubing, using master templates, measuring instruments, and cable cutters or saws.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.4% | L0 | L0L1 | 8% | 28 min | Physical presence, Accountability, Access to systems |
| Install accessories in swaging machines, using hand tools.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.4% | L0 | L0L0 | 3% | 30 min | Physical presence, Accountability, Access to systems |
| Assemble prototypes or integrated-technology demonstrators of new or emerging environmental technologies for aircraft.Aircraft Structure, Surfaces, Rigging, and Systems Assemblers · supplemental task | 1.3% | L0 | L0L1 | 12% | 24 h | Physical presence, Accountability, Access to systems |
Level: consensus of the two models (the lower level when they disagree). Share: part of the task’s working time an agent could take over. Human time: minutes a competent person needs for one instance, as estimated by the models.
Against other measures
Exposure is not delegation
| Measure | Value | Percentile | Pct |
|---|---|---|---|
| ADI (this index) | 7.5% | 13 | |
| Eloundou et al. (2024), GPT exposure β | 0.06 | 11 | |
| Felten et al. (2021), AI occupational exposure | -0.912 | 25 | |
| Webb (2020), AI patent exposure | 55 | 48 | |
| Eisfeldt et al. (2026), generative AI exposure | 0.067 | 28 | |
| Anthropic Economic Index, observed use | 0.025 | 51 |
Earlier indices measure whether AI can touch a task; ADI measures how much of it an agent can carry out from a goal. – : the source does not cover this occupation.
Same sub-major group (82)
Neighbouring occupations
| Occupation | ADI | % |
|---|---|---|
| Assemblers not elsewhere classified 8219 | 18.2 | |
| Electrical and electronic equipment assemblers 8212 | 10.4 |
Dashed line: mechanical machinery assemblers (7.5%).
Cite this record
Text
Espinal Maya, Cristian, and Santiago Jiménez Londoño. 2026. ADI v2026.1: Agent Delegability Index data, code and MCP server. Zenodo. https://doi.org/10.5281/zenodo.23552918. Record: Mechanical machinery assemblers (ISCO-08 8211), https://balamlabs.org/adi/occupations/8211
BibTeX
@misc{espinal2026adidata,
title = {{ADI} v2026.1: Agent Delegability Index data, code and {MCP} server},
author = {Espinal Maya, Cristian and Jim{\'e}nez Londo{\~n}o, Santiago},
year = {2026},
publisher = {Zenodo},
version = {v2026.1},
doi = {10.5281/zenodo.23552918},
url = {https://doi.org/10.5281/zenodo.23552918},
note = {Record: Mechanical machinery assemblers (ISCO-08 8211)}
}Machine-readable
The same record as static JSON, with its citation: /adi/v2026.1/isco/8211.json.