# Inspectors, Testers, Sorters, Samplers, and Weighers

US SOC code 51-9061. Markdown version of https://futurehistory.earth/timeline/51-9061

Also called: Quality control inspector, Quality inspector, Production inspector, Manufacturing inspector, Quality assurance inspector.

## In brief

In May 2025, [BLS](https://www.bls.gov/oes/special-requests/oesm25nat.zip) counted **597,370** US inspectors, testers, sorters, samplers, and weighers, with median pay of **$48,570** a year. Of the BLS counts since 2003, the May 2025 count is the highest. The earliest figure here is [an estimate](https://usa.ipums.org/usa/volii/92occup.shtml) of **150,000** from 1920, not measured the same way as today's count. The last full technology era in this work: High-resolution machine vision + deep learning, 2010 to 2018. In practice, employment stabilized rather than declining, partly because the number of products being manufactured and inspected continued to grow.

## What the sources say

### Official outlook

BLS projects employment to grow 2.5% from 2025 to 2035. Source: [BLS Employment Projections 2025-35](https://data.bls.gov/projections/nationalMatrix?queryParams=51-9061&ioType=o).

### AI exposure studies

- **17.7%** of this job's tasks are exposed to large language models. Not a forecast of job losses. [Eloundou and others, 2023](https://github.com/openai/GPTs-are-GPTs/blob/main/data/occ_level.csv)
- **0.98** estimated probability that the whole occupation could be computerised, over an unspecified number of years. Not a forecast of job losses. [Frey and Osborne, 2013](https://oms-www.files.svdcdn.com/production/downloads/academic/The_Future_of_Employment.pdf)

### Since the 2013 prediction

In 2013, Frey and Osborne put this job's probability of computerisation at 0.98. BLS counted **471,750** of these jobs in May 2013 and **597,370** in May 2025 (+27%, a change derived by Future History).

Data as of BLS OEWS May 2025; BLS Employment Projections 2025-35. BLS publishes these counts as yearly survey snapshots and cautions against reading them as a precise trend. In May 2021 BLS changed how it estimates these counts (a model-based method using three years of survey data) and moved fully to the 2018 occupation codes, so part of a change across 2021 can come from the method rather than the work.

## Inspectors, Testers, Sorters, Samplers, and Weighers employment and pay by year

- On record since: 1911
- Latest US employment: 597,370 (May 2025). Source: BLS OEWS May 2025 [5]
- Latest US median pay: $48,570 (May 2025). Source: BLS OEWS May 2025 [12]
- Outlook: +2.5% by 2035. Source: BLS Employment Projections 2025-35 [33]

### In other countries

The latest figure each country's statistics agency publishes for this job. Each uses its own occupation definition, survey basis and currency, so the numbers are not directly comparable with each other or with the US figures.

- **United Kingdom** (UK SOC 8143)
  - Employment, 2025: 36,000. Source: ONS ASHE 2025 [8]. ONS Annual Survey of Hours and Earnings (Table 14): employee jobs in SOC 8143 Routine inspectors and testers, United Kingdom, 2025 (ASHE "number of jobs", thousands x1000; excludes self-employment). Open Government Licence v3.0.
  - Median pay, 2025: £33,982. Source: ONS ASHE 2025 [17]. ONS Annual Survey of Hours and Earnings (Table 14.7a): median gross annual pay for all employee jobs in SOC 8143 Routine inspectors and testers, United Kingdom, 2025. Open Government Licence v3.0.
- **Australia** (ANZSCO 8393)
  - Employment, 2025: 12,100. Source: ABS Labour Force Survey [9]. ABS Labour Force Survey (Detailed), table EQ08: employed persons in ANZSCO 8393 Product Quality Controllers, national (summed across sex and state/territory), annual average of 4 quarterly estimates.
  - Median pay, 2025: A$73,008. Source: ABS Employee Earnings May 2025 [18]. Annualised (x52) from A$1,404 median weekly earnings. ABS Survey of Employee Earnings and Hours, May 2025: median pay for full-time non-managerial employees paid at the adult rate, before tax. Surfaced via the Jobs and Skills Australia occupation profile.

### All 27 years of cited US data

| Year | US employment | Annual pay (median unless marked) | Source |
| --- | --- | --- | --- |
| 1920 | 150,000 (estimate) | n/a | Est., IPUMS USA [1] |
| 1940 | 350,000 (estimate) | n/a | Est., ASQ [2] |
| 1950 | 550,000 (estimate) | $3,200 (estimate) | Est., American Society for Quality (employment) [3]; Est., University of Missouri Libraries (pay) [10] |
| 1980 | 1,100,000 (estimate) | $16,500 (estimate) | Est., BLS [4] |
| 2003 | 497,300 | $27,750 | BLS OEWS May 2003 [5] |
| 2004 | 495,430 | $28,410 | BLS OEWS May 2004 [5] |
| 2005 | 506,160 | $29,200 | BLS OEWS May 2005 [5] |
| 2006 | 483,020 | $29,420 | BLS OEWS May 2006 [5] |
| 2007 | 472,900 | $30,310 | BLS OEWS May 2007 [5] |
| 2008 | 467,010 | $31,240 | BLS OEWS May 2008 [5] |
| 2009 | 430,450 | $32,330 | BLS OEWS May 2009 [5] |
| 2010 | 410,750 | $33,030 | BLS OEWS May 2010 [5] |
| 2011 | 434,170 | $34,040 | BLS OEWS May 2011 [5] |
| 2012 | 454,010 | $34,460 | BLS OEWS May 2012 [5] |
| 2013 | 471,750 | $34,940 | BLS OEWS May 2013 [5] |
| 2014 | 489,750 | $35,330 | BLS OEWS May 2014 [5] |
| 2015 | 508,590 | $36,000 | BLS OEWS May 2015 [5] |
| 2016 | 518,950 | $36,780 | BLS OEWS May 2016 (employment) [5]; BLS OEWS May 2016 (pay) [13] |
| 2017 | 537,500 | $37,340 | BLS OEWS May 2017 [5] |
| 2018 | 557,510 | $38,250 | BLS OEWS May 2018 [5] |
| 2019 | 576,950 | $39,140 | BLS OEWS May 2019 [5] |
| 2020 | 549,200 | $40,460 | BLS OEWS May 2020 [5] |
| 2021 | 551,380 | $38,580 | BLS OEWS May 2021 [5] |
| 2022 | 579,740 | $43,900 | BLS OEWS May 2022 [5] |
| 2023 | 584,630 | $45,850 | BLS OEWS May 2023 [5] |
| 2024 | 591,180 | $47,460 | BLS OEWS May 2024 [5] |
| 2025 | 597,370 | $48,570 | BLS OEWS May 2025 [5] |

## Sources (109)

### Employment series

1. [IPUMS USA — 1920 Occupation Codes (inspectors and examiners in manufacturing industries)](https://usa.ipums.org/usa/volii/92occup.shtml), IPUMS / University of Minnesota
2. [ASQ — "History of Quality" (pre-WWII and wartime quality management)](https://asq.org/quality-resources/history-of-quality), American Society for Quality
3. [American Society for Quality — ASQ History (founded February 16, 1946, by 253 members from 17 quality societies)](https://asq.org/about-asq/how-we-do-it/history), American Society for Quality
4. [BLS — "Forty years of falling manufacturing employment" (BLS Beyond the Numbers, 2020)](https://www.bls.gov/opub/btn/volume-9/forty-years-of-falling-manufacturing-employment.htm), Bureau of Labor Statistics
5. BLS OEWS, national cross-industry estimates (flat file), Bureau of Labor Statistics. Editions: [2003](https://www.bls.gov/oes/special-requests/oesm03nat.zip), [2004](https://www.bls.gov/oes/special-requests/oesm04nat.zip), [2005](https://www.bls.gov/oes/special-requests/oesm05nat.zip), [2006](https://www.bls.gov/oes/special-requests/oesm06nat.zip), [2007](https://www.bls.gov/oes/special-requests/oesm07nat.zip), [2008](https://www.bls.gov/oes/special-requests/oesm08nat.zip), [2009](https://www.bls.gov/oes/special-requests/oesm09nat.zip), [2010](https://www.bls.gov/oes/special-requests/oesm10nat.zip), [2011](https://www.bls.gov/oes/special-requests/oesm11nat.zip), [2012](https://www.bls.gov/oes/special-requests/oesm12nat.zip), [2013](https://www.bls.gov/oes/special-requests/oesm13nat.zip), [2014](https://www.bls.gov/oes/special-requests/oesm14nat.zip), [2015](https://www.bls.gov/oes/special-requests/oesm15nat.zip), [2016](https://www.bls.gov/oes/special-requests/oesm16nat.zip), [2017](https://www.bls.gov/oes/special-requests/oesm17nat.zip), [2018](https://www.bls.gov/oes/special-requests/oesm18nat.zip), [2019](https://www.bls.gov/oes/special-requests/oesm19nat.zip), [2020](https://www.bls.gov/oes/special-requests/oesm20nat.zip), [2021](https://www.bls.gov/oes/special-requests/oesm21nat.zip), [2022](https://www.bls.gov/oes/special-requests/oesm22nat.zip), [2023](https://www.bls.gov/oes/special-requests/oesm23nat.zip), [2024](https://www.bls.gov/oes/special-requests/oesm24nat.zip), [2025](https://www.bls.gov/oes/special-requests/oesm25nat.zip)
6. ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8133, United Kingdom. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0., Office for National Statistics. Editions: [2002](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2002/2002-table-14.zip), [2006](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2006consistentw_007methodology/2006-table-14.zip), [2010](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2010revised/2010-revised-table-14.zip), [2011](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2011revisedbasedonsoc2010/2011-revised-table-14.zip), [2015](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2015/table142015revised.zip), [2020](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2020revised/table142020revised.zip)
7. [ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8143, United Kingdom, 2022. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0.](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2022revised/ashetable142022revised.zip), Office for National Statistics
8. [ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8143, United Kingdom, 2025. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0.](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2025provisional/ashetable142025provisional.zip), Office for National Statistics
9. [ABS: Labour Force, Australia, Detailed, table EQ08 (Employed persons by Occupation unit group, ANZSCO 2013), latest release](https://www.abs.gov.au/statistics/labour/employment-and-unemployment/labour-force-australia-detailed/latest-release), Australian Bureau of Statistics

### Wage series

10. [University of Missouri Libraries — "Prices and Wages by Decade: 1950-1959" (industrial production workers, semi-skilled inspection circa $1.50-1.80/hr)](https://libraryguides.missouri.edu/pricesandwages/1950-1959), University of Missouri Libraries / BLS historical sources
11. [BLS — "Forty years of falling manufacturing employment" (production worker wages at manufacturing peak, 1979-1980)](https://www.bls.gov/opub/btn/volume-9/forty-years-of-falling-manufacturing-employment.htm), Bureau of Labor Statistics
12. BLS OEWS, national cross-industry estimates (flat file), Bureau of Labor Statistics. Editions: [2003](https://www.bls.gov/oes/special-requests/oesm03nat.zip), [2004](https://www.bls.gov/oes/special-requests/oesm04nat.zip), [2005](https://www.bls.gov/oes/special-requests/oesm05nat.zip), [2006](https://www.bls.gov/oes/special-requests/oesm06nat.zip), [2007](https://www.bls.gov/oes/special-requests/oesm07nat.zip), [2008](https://www.bls.gov/oes/special-requests/oesm08nat.zip), [2009](https://www.bls.gov/oes/special-requests/oesm09nat.zip), [2010](https://www.bls.gov/oes/special-requests/oesm10nat.zip), [2011](https://www.bls.gov/oes/special-requests/oesm11nat.zip), [2012](https://www.bls.gov/oes/special-requests/oesm12nat.zip), [2013](https://www.bls.gov/oes/special-requests/oesm13nat.zip), [2014](https://www.bls.gov/oes/special-requests/oesm14nat.zip), [2015](https://www.bls.gov/oes/special-requests/oesm15nat.zip), [2017](https://www.bls.gov/oes/special-requests/oesm17nat.zip), [2018](https://www.bls.gov/oes/special-requests/oesm18nat.zip), [2019](https://www.bls.gov/oes/special-requests/oesm19nat.zip), [2020](https://www.bls.gov/oes/special-requests/oesm20nat.zip), [2021](https://www.bls.gov/oes/special-requests/oesm21nat.zip), [2022](https://www.bls.gov/oes/special-requests/oesm22nat.zip), [2023](https://www.bls.gov/oes/special-requests/oesm23nat.zip), [2025](https://www.bls.gov/oes/special-requests/oesm25nat.zip)
13. [BLS Occupational Outlook Handbook — Quality Control Inspectors (citing May 2016 OEWS median annual wage $36,780)](https://www.bls.gov/ooh/production/quality-control-inspectors.htm), Bureau of Labor Statistics
14. [BLS OEWS May 2024, national cross-industry estimates (flat file)](https://www.bls.gov/oes/special-requests/oesm24nat.zip), U.S. Bureau of Labor Statistics
15. ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8133, United Kingdom. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0., Office for National Statistics. Editions: [2002](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2002/2002-table-14.zip), [2006](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2006consistentw_007methodology/2006-table-14.zip), [2010](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2010revised/2010-revised-table-14.zip), [2011](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2011revisedbasedonsoc2010/2011-revised-table-14.zip), [2015](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2015/table142015revised.zip), [2020](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2020revised/table142020revised.zip)
16. [ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8143, United Kingdom, 2022. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0.](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2022revised/ashetable142022revised.zip), Office for National Statistics
17. [ONS: Annual Survey of Hours and Earnings, Table 14.7a (Annual pay - Gross), 4-digit SOC 8143, United Kingdom, 2025. Office for National Statistics, Annual Survey of Hours and Earnings, Table 14. Licensed under the Open Government Licence v3.0.](https://www.ons.gov.uk/file?uri=/employmentandlabourmarket/peopleinwork/earningsandworkinghours/datasets/occupation4digitsoc2010ashetable14/2025provisional/ashetable142025provisional.zip), Office for National Statistics
18. [Jobs and Skills Australia: Product Quality Controllers (ABS Survey of Employee Earnings and Hours, May 2025)](https://www.jobsandskills.gov.au/data/occupation-and-industry-profiles/occupations/8393-product-quality-controllers), Jobs and Skills Australia / Australian Bureau of Statistics

### Tool eras

19. [ASQ — "History of Quality" (craft era and early factory inspection)](https://asq.org/quality-resources/history-of-quality), American Society for Quality
20. [Wikipedia — Scientific management (Taylor system, inspection separation)](https://en.wikipedia.org/wiki/Scientific_management), Wikipedia
21. [J.M. Juran, "A History of Managing for Quality in the United States, Part 2" (Quality Digest; Taylor system separated inspection from production, giving rise to the QC department)](https://www.qualitydigest.com/static/magazine/dec/juran-2.html), Quality Digest
22. [Lean Blog — "Celebrating 100 Years of Shewhart's Control Charts: A Century of Quality Management" (May 16, 1924 memo at Bell Labs)](https://www.leanblog.org/2024/05/celebrating-100-years-of-shewharts-control-charts-a-century-of-quality-management/), Lean Blog
23. [The Digestible Deming — "Dr. Shewhart's First Control Chart" (p-Chart, first three-sigma limits, 1924)](https://digestibledeming.substack.com/p/dr-shewharts-first-control-chart), The Digestible Deming
24. [ASQ — "ASQ History" (ASQC founded February 16, 1946, to sustain wartime quality techniques)](https://asq.org/about-asq/how-we-do-it/history), American Society for Quality
25. [Wikipedia — Coordinate-measuring machine (Ferranti 1959, commercial history)](https://en.wikipedia.org/wiki/Coordinate-measuring_machine), Wikipedia
26. [W. Edwards Deming Institute — "If Japan Can, Why Can't We? 1980 NBC Special Report"](https://deming.org/if-japan-can-why-cant-we-1980-nbc-special-report/), W. Edwards Deming Institute
27. [Wikipedia — If Japan Can... Why Can't We? (NBC 1980 documentary)](https://en.wikipedia.org/wiki/If_Japan_Can..._Why_Can%27t_We%3F), Wikipedia
28. [Wikipedia — Cognex Corporation (founded 1981, first product 1982)](https://en.wikipedia.org/wiki/Cognex_Corporation), Wikipedia
29. [ISO — "ISO 9000:1987 Quality management and quality assurance standards"](https://www.iso.org/standard/16529.html), International Organization for Standardization
30. [Six Sigma Online — "The History of Six Sigma: From Motorola to Global Adoption" (Bill Smith 1986, Jack Welch GE 1995)](https://www.sixsigmaonline.org/six-sigma-history/), Six Sigma Online
31. [Keyence America — "Using Artificial Intelligence in Machine Vision" (deep learning for micro-defect detection)](https://www.keyence.com/products/vision/resources/vision-resources/using-artificial-intelligence-in-machine-vision.jsp), Keyence America
32. [NVIDIA Blogs — "Andrew Ng Startup, Landing AI, Speeds Factory Inspection" (Foxconn, Stanley Black & Decker, Denso customers; data-centric AI visual inspection)](https://blogs.nvidia.com/blog/andrew-ng-ai-factory-landing/), NVIDIA

### Forecasts and exposure studies

33. [BLS Employment Projections 2025-35, National Employment Matrix: 51-9061 Inspectors, testers, sorters, samplers, and weighers (2025: 602.0 thousand; 2035: 617.2 thousand; +2.5%)](https://data.bls.gov/projections/nationalMatrix?queryParams=51-9061&ioType=o), Bureau of Labor Statistics
34. [Frey & Osborne (2013), "The Future of Employment: How Susceptible Are Jobs to Computerisation?", Appendix (SOC 51-9061 Inspectors, Testers, Sorters, Samplers, and Weighers: probability 0.98, rank 670 of 702)](https://oms-www.files.svdcdn.com/production/downloads/academic/The_Future_of_Employment.pdf), Oxford Martin School, University of Oxford
35. [Eloundou, Manning, Mishkin & Rock (2023), "GPTs are GPTs", occupation-level exposure data occ\_level.csv (O\*NET-SOC 51-9061.00, human-rated β 0.177)](https://github.com/openai/GPTs-are-GPTs/blob/main/data/occ_level.csv), OpenAI

### Historical notes

36. [Wikipedia — Scientific management (Taylor 1911, inspection separation)](https://en.wikipedia.org/wiki/Scientific_management), Wikipedia
37. [The Digestible Deming — "Dr. Shewhart's First Control Chart" (May 16, 1924 memo)](https://digestibledeming.substack.com/p/dr-shewharts-first-control-chart), The Digestible Deming
38. [ASQ — "ASQ History" (founded February 16, 1946)](https://asq.org/about-asq/how-we-do-it/history), American Society for Quality
39. [W. Edwards Deming Institute — "Speech by Dr. Deming to Japanese Business Leaders in 1950"](https://deming.org/speech-by-dr-deming-to-japanese-business-leaders-in-1950/), W. Edwards Deming Institute
40. [W. Edwards Deming Institute — "If Japan Can, Why Can't We? 1980 NBC Special Report"](https://deming.org/if-japan-can-why-cant-we-1980-nbc-special-report/), W. Edwards Deming Institute
41. [ISO — "ISO 9000:1987 Quality management and quality assurance standards"](https://www.iso.org/standard/16529.html), International Organization for Standardization
42. [Wikipedia — FDA Food Safety Modernization Act (signed January 4, 2011)](https://en.wikipedia.org/wiki/FDA_Food_Safety_Modernization_Act), Wikipedia
43. [O\*NET / BLS — 51-9061.00 employment statistics](https://www.onetonline.org/link/summary/51-9061.00), O\*NET / BLS

### Predecessors & successors

44. [Wikipedia — Scientific management (Taylor system created inspection as distinct from production)](https://en.wikipedia.org/wiki/Scientific_management), Wikipedia
45. [ASQ — History (ASQC founded 1946 by wartime QC workforce)](https://asq.org/about-asq/how-we-do-it/history), American Society for Quality

### Present-day analysis

- [O\*NET 30.3 — Inspectors, Testers, Sorters, Samplers, and Weighers (51-9061.00)](https://www.onetonline.org/link/summary/51-9061.00), accessed 2026-06-03
- [BLS Occupational Outlook Handbook — Quality Control Inspectors (2024-34 projections)](https://www.bls.gov/ooh/production/quality-control-inspectors.htm), accessed 2026-06-03
- [Eloundou et al. 2024 — GPTs are GPTs (Science) — physical inspection tasks classified E0 for LLM exposure](https://arxiv.org/abs/2303.10130), accessed 2026-06-03
- [Cognex — In-Sight 2800 deep learning vision system launch (Apr 2022)](https://www.cognex.com/company/press-releases/2022/cognex-in-sight-2800-combines-deep-learning-and-traditional-vision-in-an-easy-to-use-package), accessed 2026-06-03
- [Vision Systems Design — Keyence IV4 Series with built-in AI launched (Apr 2025)](https://www.vision-systems.com/cameras-accessories/image-sensors/article/55279655/keyence-launches-new-sensor-series-with-built-in-ai), accessed 2026-06-03
- [Overview.ai — AI Inspection Systems for Manufacturing: Complete 2025 Guide](https://www.overview.ai/blog/ai-inspection-systems-manufacturing/), accessed 2026-06-03
- [Instrumental — Manual Inspection vs. AI Inspection: performance and workforce impact](https://instrumental.com/build-better-handbook/machine-vision-vs-manual-inspection-vs-instrumental), accessed 2026-06-03
- [Elementary ML — Top 6 Machine Vision Systems for Manufacturing in 2025](https://www.elementaryml.com/blog/top-6-machine-vision-systems-for-manufacturing-in-2025), accessed 2026-06-03
- [ASQ — Certified Quality Inspector (CQI) certification](https://www.asq.org/cert/quality-inspector), accessed 2026-06-03
- [InfinityQS — Enact cloud-based SPC platform (quality data collection, real-time SPC)](https://www.advantive.com/products/infinity-qs-proficient/), accessed 2026-06-03
- [O\*NET 30.3 — Inspectors, Testers, Sorters, Samplers, and Weighers: technology skills (PC-DMIS, CMM software)](https://www.onetonline.org/link/details/51-9061.00), accessed 2026-06-03
- [ifactory — Real-Time SPC Monitoring Software with AI Statistical Process Control Alerts (2025)](https://ifactoryapp.com/article/real-time-spc-monitoring-software-statistical-process-control-ai-alerts), accessed 2026-06-03

How to read these figures: https://futurehistory.earth/methodology. Every figure links to its own source; gaps stay gaps.