{"id":51555190,"url":"https://github.com/marksxiety/man-hours-calculator","last_synced_at":"2026-07-10T04:01:49.144Z","repository":{"id":344590580,"uuid":"1181437043","full_name":"marksxiety/man-hours-calculator","owner":"marksxiety","description":"Data-driven framework for calculating software project man hours using PERT methodology, Calculate expected duration, variance, completion probability to create quotes you can defend.","archived":false,"fork":false,"pushed_at":"2026-07-09T03:17:46.000Z","size":515,"stargazers_count":3,"open_issues_count":0,"forks_count":1,"subscribers_count":1,"default_branch":"main","last_synced_at":"2026-07-09T05:10:20.472Z","etag":null,"topics":["data-driven-framework","man-hours","pert","single-page-app","task-calculation","task-management","typescipt","vuejs"],"latest_commit_sha":null,"homepage":"https://man-hours-calculator.vercel.app","language":"Vue","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/marksxiety.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG.md","contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-03-14T06:11:02.000Z","updated_at":"2026-07-09T03:17:09.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/marksxiety/man-hours-calculator","commit_stats":null,"previous_names":["marksxiety/man-hours-calculator"],"tags_count":6,"template":false,"template_full_name":null,"purl":"pkg:github/marksxiety/man-hours-calculator","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marksxiety%2Fman-hours-calculator","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marksxiety%2Fman-hours-calculator/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marksxiety%2Fman-hours-calculator/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marksxiety%2Fman-hours-calculator/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/marksxiety","download_url":"https://codeload.github.com/marksxiety/man-hours-calculator/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marksxiety%2Fman-hours-calculator/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":35319810,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-07-10T02:00:06.465Z","response_time":60,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["data-driven-framework","man-hours","pert","single-page-app","task-calculation","task-management","typescipt","vuejs"],"created_at":"2026-07-10T04:01:48.313Z","updated_at":"2026-07-10T04:01:49.137Z","avatar_url":"https://github.com/marksxiety.png","language":"Vue","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Man-Hours Calculator\n\n![Tests](https://github.com/marksxiety/man-hours-calculator/actions/workflows/tests.yml/badge.svg)\n![Build](https://github.com/marksxiety/man-hours-calculator/actions/workflows/build.yml/badge.svg)\n![Lint](https://github.com/marksxiety/man-hours-calculator/actions/workflows/lints.yml/badge.svg)\n![MIT License](https://img.shields.io/badge/License-MIT-yellow.svg)\n\nThe Man-Hours Calculator is a data-driven framework designed to bridge the gap between technical uncertainty and business requirements. By replacing \"gut-feeling\" guesses with the Program Evaluation and Review Technique (PERT), it provides a disciplined way to account for the inherent risks in software development.\n\n---\n\n## The PERT Methodology\n\nThe core of this system is the three-point estimation technique. Instead of providing a single number, developers provide three distinct data points for every task:\n\n1. Optimistic (O): The \"perfect world\" scenario—no blockers or surprises.\n2. Most Likely (M): The most realistic, frequent outcome under normal conditions.\n3. Pessimistic (P): The \"worst-case\" scenario—unexpected bugs or hidden dependencies.\n\n### The Weighted Average (Expected Duration)\nThe system calculates Expected Duration (E) using a weighted average that deliberately leans toward the most likely estimate while still accounting for outliers:\n\n$$E = \\frac{O + 4M + P}{6}$$\n\nThe \"4M\" weight reflects real-world behavior: outcomes cluster around what is most likely. Pure averages treat all scenarios equally, which often overestimates uncertainty. This formula keeps the estimate grounded while acknowledging the \"tails\" of risk.\n\n---\n\n## Features and Interface\n\n* Real-Time Computation: All calculations update instantly as you type, including task-level duration, standard deviation, and project-level variance.\n* Probability Analysis: Calculates the statistical chance of finishing by a target deadline based on accumulated project variance.\n* Developer Feedback Loop: Allows developers to self-correct unrealistic estimates by seeing the mathematical impact of their inputs immediately.\n* Modern Tech Stack: Built with Vue 3, TypeScript, Vite, and TailwindCSS for a high-performance experience.\n\n---\n\n## Understanding the Math\n\n### Standard Deviation (σ)\nA measure of \"spread\"—how far apart your best and worst-case guesses are.\nFormula: $$\\sigma = \\frac{P - O}{6}$$\n* Small σ: Signals high confidence; the task is well-understood.\n* Large σ: Acts as a warning sign; the task is unpredictable or poorly scoped.\n\n### Variance (σ²)\nVariance is the key to project-level uncertainty. While you cannot add standard deviations together, variances can be summed to find the total project risk. Higher cumulative variance means a wider, less predictable delivery window.\n\n### Confidence Intervals\n| Range | Interpretation |\n|---|---|\n| E ± 1σ | ~68% chance of finishing within this window |\n| E ± 2σ | ~95% chance of finishing within this window |\n| E ± 3σ | ~99.7% chance of finishing within this window |\n\n---\n\n## Glossary of Terms\n\n* PERT: Program Evaluation and Review Technique—a statistical tool used in project management.\n* Estimation Debt: The accumulated cost of optimistic guesses that ignore technical reality.\n* Sigma (σ): A statistical term for Standard Deviation; used here to represent task-level risk.\n* Expected Duration (E): The final number used for planning, derived from the weighted PERT formula.\n\n---\n\n## Documentation Links\n\n* [Getting Started](./docs/getting-started.md) — Setup and installation.\n* [Usage Guide](./docs/usage.md) — How to use the app effectively.\n* [Testing Guide](./docs/tests.md) — Unit testing and build verification.\n\n---\n\n## Project Goal\nTo eliminate \"Estimation Debt\" by applying a mathematical approach to quoting that accounts for uncertainty while providing full transparency to both developers and stakeholders.","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarksxiety%2Fman-hours-calculator","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmarksxiety%2Fman-hours-calculator","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarksxiety%2Fman-hours-calculator/lists"}