Critical-path project planner

What it does

Calculate project duration, critical tasks and slack, then compare the effect of extending a task.

How to use it

1. Enter tasks as CSV or JSON, optionally add a task delay, and calculate the baseline and scenario.
2. Processing stays in your browser. No upload or sign-up.

Example

Design 3, Build 5, Copy 2 and Launch 1 produce a nine-unit project; Copy has three units of slack.

Methodology

A topological forward pass finds earliest starts/finishes; a backward pass finds latest starts/finishes and total slack. Zero-slack tasks and connecting critical edges identify critical branches.

Limitations

200 tasks, 100,000 input characters, unique task IDs up to 80 characters and durations 0–1 million units; extra duration up to one million. Cycles and missing dependencies fail. Finish-to-start dependencies and unlimited parallel resources; no calendars, staffing optimization or resource levelling.

Automation

This tool runs in your browser. No upload API or MCP endpoint is available.