Main Point
Follow a faster draft through to an accepted result and count the effort required from everyone involved. A complete comparison tells a team where work changed and what it should investigate before expanding a pilot.
Key Points
- Define the useful output and common acceptance standard before counting results.
- Add drafting, checking, correction and other included staff effort with a stated treatment of setup.
- Compare like tasks, quality and periods; keep labor, cost, energy and elapsed delay in their own measures.
- Use the record to locate a bottleneck, test a process change and plan the next evidence needed.
1. The Team's Decision
An imagined community team sees drafting time fall from 90 to 30 minutes and wants to expand its assistant pilot. Its real task is to deliver 10 accepted briefings from approved public documents. Every briefing must contain the requested information, support factual claims with those sources and pass the same review checklist. All figures in this worked case are teaching assumptions.
An accepted briefing supplies the useful-output unit. Generated tokens and drafts help describe earlier steps. Following the result through source checking and correction reveals the work those steps create for other people.
For this local measure:
Labor productivity = accepted briefings ÷ total included labor hours.
Count everyone's included effort. A 30-minute task meeting with two reviewers uses one labor hour. State how waiting that occupies a worker is allocated. Elapsed delivery delay is a separate service measure.
2. Follow The Complete Batch
| Process | Drafting | Checking | Correction | Recurring effort | Accepted briefings | Briefings/labor hour |
|---|---|---|---|---|---|---|
| Baseline | 90 min | 60 min | 30 min | 180 min = 3 h | 10 | 3.33 approximately |
| First pilot | 30 min | 100 min | 70 min | 200 min = 10/3 h | 10 | 3.00 |
| Redesigned recurring process | 30 min | 45 min | 25 min | 100 min = 5/3 h | 10 | 6.00 |
The first pilot cuts drafting effort while checking and correction grow. Its rate falls by 10%, from 10/3 to 3 accepted briefings per labor hour. That directs attention to the review stages.
3. Investigate Before Choosing A Change
Inspect a rejected claim, its draft and the source used to check it. Were reviewers searching across source versions? Did they reconstruct unsupported claims? Did work move to a colleague whose time was missing from the demonstration? Those records can distinguish explanations for the extra effort.
The imagined team next prepares an approved source set and a common review template. The supplied redesigned times total 100 minutes for the same 10 accepted briefings. The recurring rate is 6 per labor hour, 80% above the baseline. In a real pilot, comparable records and an appropriate comparison would help investigate which process changes contributed.
4. Include The Transition Effort
Preparing the redesigned process takes another 60 labor minutes in our case. If the first batch bears all setup, total effort is 60 + 100 = 160 minutes = 8/3 hours. Its rate is 10 ÷ (8/3) = 3.75 accepted briefings per labor hour. Record this first-batch rate alongside the recurring rate of 6.
The allocation matters. Data preparation, training, integration, role redesign and management can consume effort before or alongside recurring work. State the period and whose time is included so another person can inspect the comparison.
5. Make The Comparison Useful For A Decision
Check task mix, acceptance standards, review quality and period. Include support and rework consistently. A real before-and-after change may combine the assistant with better sources, training or a different workload. Choose records and a comparison that can investigate those explanations.
Track dollars per accepted briefing or energy per accepted briefing separately when relevant. Higher output per labor hour can accompany increased computing spending. Formal combined-input productivity uses defined economic methods; this exercise uses an operational labor measure.
The team can now explain the first pilot's lower rate, locate the extra review effort and define a redesigned process to test. Before expanding a real service, it should collect comparable accepted-output, quality and full-effort evidence. Subsequent lessons examine how verified capacity changes connect to jobs, wages and the distribution of value.
6. What Dated Research Adds
The published 2025 study *Generative AI at Work* measured customer issues resolved per hour in one firm's support workflow. Effects differed across workers. That supplies a concrete completed-output measure and a population to inspect when planning a local study.
A September 2026 working-paper summary by Mert Demirer, Leon Musolff and Liyuan Yang distinguishes coding activity from software released and used. The lesson uses the author-hosted summary's qualitative distinction. Its software setting helps explain why an activity count should be followed to the intended finished result. Research methods, settings and scope remain attached to each example in the sources below.
7. Practice — M31-L01-P01
Use the separate six-note worksheet. Add drafting, checking and correction, calculate the recurring rate and then a first-batch rate including the supplied setup effort. Explain the result and name a record you would inspect next. Response fields remain blank in the worksheet; the example key is separate.
8. Learning Checks
M31-L01-Q01: A model's token rate doubles. What evidence is still needed before concluding that your team's labor productivity improved?
M31-L01-Q02: Compare 8 accepted reports in 2 labor hours with 12 in 4 labor hours. Both meet the same quality standard. Calculate the rates and explain the relationship between output count and productivity.
Answer before consulting the separate key. Apply the method to a familiar task by naming an accepted result, a quality standard and the complete included effort.
Sources
- Erik Brynjolfsson, Danielle Li and Lindsey Raymond, *Generative AI at Work*, *Quarterly Journal of Economics* 140(2), 889–942. Published online 4 February 2025, May 2025 issue. Staggered workplace introduction in one firm's support setting; medium-run, heterogeneous results. Use the published version for its findings.
- Mert Demirer, Leon Musolff and Liyuan Yang, *Writing Code vs. Shipping Code: Productivity Effects Across Generations of AI Coding Tools*, September 2026 working-paper version listed on Leon Musolff's research page. Author-hosted summary, revise-and-resubmit status; the qualitative activity-to-finished-output distinction is used here. Manuscript-level estimates and data-window claims are outside this lesson's use of the summary.
- U.S. Bureau of Labor Statistics, *Productivity Measures: Business Sector and Major Subsectors — Calculation*, Handbook of Methods, last modified 23 September 2020. Labor output/hour and formal combined-input methods support the definitions; the local briefing exercise uses its own accepted-output unit.
- Reserve Bank of Australia, *Productivity* explainer, definition and measurement sections. The page gives labor and multifactor concepts; publication date is unspecified on the page.
Primary sources checked on 25 October 2026. The community-team and six-note figures are fictional teaching assumptions. Statistical depth is optional further study through the linked methods.