---
title: Cross-Check Observed Work-in-Progress Against Rate Times Mean Flow Time — Free
description: An open-work count and a completion rate are not comparable until elapsed flow time supplies the missing unit. Put all three on a lane-level dial before explaining why a service backlog appears different from its normal operating model.
category: business
last_verified: 2026-10-01
freshness: green
published: 2026-10-01
canonical_url: https://gratis-ai.pages.dev/articles/service-queue-flow-time-crosscheck.html
companion_app_url: https://gratis-ai.pages.dev/apps/service-queue-flow-time-crosscheck.html
reading_time_minutes: 10
tags: business, queuelaw, local-first, explicit-assumptions, no-account
---

# Cross-Check Observed Work-in-Progress Against Rate Times Mean Flow Time — Free

An open-work count and a completion rate are not comparable until elapsed flow time supplies the missing unit. Put all three on a lane-level dial before explaining why a service backlog appears different from its normal operating model.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $4 one-time. Nothing in the free tier is gated.

## Who it's for

Small service teams checking incompatible queue statistics

## What's free

- one complete unwatermarked flow-time dial run in the app
- three labeled samples and unlimited article-demo calculations
- complete result text and a user-triggered input-state link

## Optional paid add-on

**$4 one-time.**

- unlimited subsequent flow-time dial app calculations after a local convenience signal
- print the flow-time dial with visible assumptions and its safety boundary
- CSV of the displayed items observed minus modeled and row workings; conditional estimate uses your manual-retyping minutes
- five local reading summaries (headline/count/time), not saved full inputs or cross-device backups

## Sources & verification

- Tool: GratisAI local-first instrument (no key, no account)
- Primary source: the free tool itself (local-first, no external dependency)
- Last verification: 2026-10-01 (green)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/service-queue-flow-time-crosscheck.html
- Companion app: https://gratis-ai.pages.dev/apps/service-queue-flow-time-crosscheck.html
- This machine-readable mirror: /mirrors/service-queue-flow-time-crosscheck.md

*Generated free at https://gratis-ai.pages.dev/articles/service-queue-flow-time-crosscheck.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*