Summary

This AI report generator takes your process step cycle times plus Availability, Performance, and Quality inputs, then writes a short operations report: it names the bottleneck step, estimates work in progress with Little's Law, scores your OEE against the 85% world-class and 60% industry-average benchmarks, and tells you which lever to fix first. Runs entirely in your browser, free, no signup, works for manufacturing lines, software pipelines, support queues, and logistics chains.

AI Report Generator for Bottleneck & OEE Data

Enter your process steps and OEE inputs. This AI report generator finds your bottleneck, applies Little's Law, and writes the verdict in plain English, the same way an ops engineer would read a shift report before a stand-up meeting.

Try the report generator

Bottleneck & OEE AI report generator

Add up to five process steps with their cycle time, plus your Availability, Performance, and Quality percentages. The report updates the moment you change a number, no button required.

How the report is built

Three formulas, zero guesswork

No black box. Every line of the generated report traces back to a named, citable operations formula, so you can defend the verdict in a review meeting.

Bottleneck detection

The step with the longest cycle time sets the pace for everything downstream. The report always names it first, because fixing any other step first wastes the investment, whether that step sits on a shop floor, a code review queue, or a loading dock.

Little's Law for WIP

Work in progress equals throughput times cycle time, a relationship proven by John Little in 1961 and still taught in every operations research course. We use it to estimate how many units, tickets, or shipments sit in your process at any moment, without asking you to count them by hand.

OEE the Nakajima way

Availability times Performance times Quality gives you OEE. Seiichi Nakajima's Total Productive Maintenance framework set 85% as world-class and roughly 60% as the industry average; the AI layer tells you which of the three levers is dragging you down.

Privacy, math, and edge cases

Common questions

Is this AI report generator free to use?
Yes. The calculation runs entirely in your browser, no signup and no per-report cost.
Where do the OEE and Little's Law formulas come from?
OEE = Availability x Performance x Quality is the formula Seiichi Nakajima defined for Total Productive Maintenance, with 85% cited as the world-class benchmark and roughly 60% as the industry average. Little's Law (WIP = Throughput x Cycle Time) was proven by John Little in 1961 and is standard in operations research.
Does this work outside manufacturing?
Yes. Switch the process type selector to software pipeline, support ticket queue, or logistics chain and the report adjusts its wording. The underlying math, bottleneck detection and Little's Law, applies to any process with steady flow.
Is my data stored anywhere?
No. Everything runs client-side in your browser. The only network call is an anonymous tool-run beacon used to count how many people use the tool, with no personal data attached.
What if I don't know my exact Availability, Performance, or Quality numbers?
Use your best estimate. The defaults (88%, 92%, 97%) reflect a typical mid-performing line; adjust them once you pull real numbers from your MES or shift logs.
Why does the report treat the bottleneck as more important than other steps?
Because the slowest step caps total throughput. Speeding up a non-bottleneck step only creates idle time upstream or extra inventory downstream; it does not raise output.
Can I add more than five process steps?
The generator covers up to five steps, which fits most single-cell or single-pipeline analyses. For longer value streams, run it once per segment and compare the bottlenecks.
How is this different from a plain OEE calculator?
A plain calculator gives you one number. This generator reads that number together with the bottleneck position and the Little's Law WIP estimate, then writes a short verdict telling you where to act first.

Want the AI to write the full report for you?

Skywork's Deep Research documents agent turns raw numbers into a cited, formatted report, complete with charts and sourced context, in minutes, so you can hand a finished document to your plant manager instead of a spreadsheet.

BottleneckCalc
Open the AI analyst