01
Monte Carlo Forecast
What can we close this month? Probabilistic answers at 50th, 70th, 85th, 95th confidence — calculated from your own delivery history, not guesswork.
TechBSS · Flow Lens
Kanban flow metrics.
Entirely in your browser.
Drop in your flow data CSV and get cycle time, throughput, WIP, aging work, a Cumulative Flow Diagram, and a Monte Carlo forecast — instantly. No login. No server. No data leaving your machine.
Single HTML file · open in any modern browser · free
· No login· No server· No data leaves your machine· Single HTML file· Works offline· Free
What it shows
The metrics that actually move delivery.
No vanity charts. Flow metrics, forecasts, and a period-over-period health scorecard — the things that tell you whether your system is healthy, and where to look when it isn't.
02
Team Health
Current period vs the previous one of the same length: throughput, cycle time, WIP, flow efficiency, blocked count. Green, amber, red — no theatre.
03
Cycle Time
Percentile control chart and histogram. p50, p70, p85, p95 lines drawn from your own data. Outliers are visible immediately.
04
Cumulative Flow
Interactive CFD with clickable range markers. Select any period to read WIP, throughput and cycle time directly from the chart.
05
Throughput
Weekly completion bars with a 4-week rolling average. Understand your team's real delivery cadence over time.
06
Aging WIP
Every in-progress item plotted by stage and age, colour-coded against your own completed cycle time percentiles.
Inside the lens
Thirteen views. Every one earns its place.
01 / 05
Flow Insights
Throughput, cycle time percentiles, WIP count, and aged items — the whole system at a glance.
02 / 05
Cumulative Flow Diagram
Bands reveal pile-ups. Slope is throughput. Horizontal distance is cycle time.
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Throughput
Weekly completions with a 4-week rolling average. Flat and steady is the goal.
04 / 05
Aging WIP
Every in-progress item by stage and age, coloured against your own completed cycle time percentiles.
05 / 05
Team Health
This period vs the last one of the same length. Green stable, amber watch, red act.
How it works
Three steps. Roughly two minutes.
- 01
Download
One HTML file. Save it somewhere handy. That's the entire install.
- 02
Open
Double-click it. Chrome, Edge, Firefox, Safari — any modern browser. Offline is fine.
- 03
Drop your CSV
Stage columns are detected automatically. Label each stage once — active work or queue — and every chart appears instantly.
Your data stays put
Built for IT teams that say no by default.
Flow Lens is a single HTML file. It reads your CSV with the browser's File API, holds it in memory, draws the charts, and forgets it the moment you close the tab. There is no server, no account, no telemetry, no cookies — nothing to approve, nothing to breach.
- CSV uploaded to a server?No — browser memory only.
- Data sent over the internet?No — never leaves your device.
- Stored in cookies or localStorage?No — nothing is persisted.
- Analytics or telemetry?None — zero network requests.
- Account required?No — there isn't even a login screen.
- Works offline?Yes — always, with no setup.
Take it for a spin