I built a free calculator that shows what adding, replacing or waiting to add a person really does to a team's output: when the new person starts paying off, and whether a project finishes sooner or later. No sign-up, and your numbers never leave your browser. 👉 https://teamproductivitycalculator.app Why "Let's just add another person" is a common answer to a slipping deadline. Sometimes it's right, sometimes it isn't: a new person needs weeks or months to get up to speed, and the people training them slow down while they do. The team can get slower before it gets faster. Most of these decisions are made on gut feel, so I wanted something that puts numbers on it. How it works Each person gets two estimates: how productive they are (100% = the best in your industry), and how much of their colleagues' time they take up ("friction"). Both can change over time as people settle in. The calculator shows the team's output on a chart, when each newcomer pays off, and how a project's finish date moves. It's not only for staffing decisions. Filling in the numbers together is a good way to see how a team is performing today, and when people disagree on the numbers, that's a useful conversation about what's holding the team back. There are examples for software, sales and accounting teams (and friends helping you move house), plus a FAQ on the research behind it. Monetisation Free to use. The plan is to add ads once there's enough traffic. Feedback welcome I'd really appreciate any feedback: what's useful, what's confusing, what's missing, or where the results don't match your experience. Happy to answer questions about the model or the build.   submitted by   /u/YouMaySayIamADreamer [link]   [comments]