In the walk-through: space or → for the next step, ← to go back. You can skip to the calculator at any point.
Five quick questions. Answer as many as you like. Answers go to the app’s author through a Google Form. No names or emails are collected, so please don’t type any.
Any project that changed how work gets done. Not built yet? Start at A and B. Already running? Start at Cost.
Tap a row to open it. Tap ? for help. Rough numbers are fine if you can say where they came from.
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Don’t start from an idea. Start from where the time goes. For one week, jot down how long you spend on two or three tasks that come round again and again. The biggest one is usually your best project, and you already have its starting number.
Can’t log it yourself, or it’s other people’s time? Your manager often already knows how long it takes, how many people do it, and what an hour of their time costs. The button copies a short message asking for exactly that.
Write two versions. The north star is what you’re aiming for. The MVP is the smallest version you could build and test in a day. Put the numbers on the MVP, not the north star: small numbers you can check beat big ones you can’t.
Pair check: is the north star exciting enough? Is the MVP small enough?
Count everything, not just the licence. People’s time is the cost most business cases forget.
Not sure what an hour costs? Ask your manager or HR for the salary, add what the employer pays on top (pension, NI), and divide by the hours worked in a year.
How you could find out: one question after someone uses it (“How useful was that, 1 to 5?”), or a quick poll at a team meeting.
In their words
Do people know it exists, how to use it, and when not to trust it? Count someone only if they could show you, or passed a quick check.
How you know
This is where most projects stall. Count real use, not sign-ups: who used it in the last month, and how often.
Source
If your project saves time for the people using it, ask them. A five-minute questionnaire works. Everyone who doesn’t reply counts as no change, so chase the replies. For the people whose time is saved, a short interview is even better.
One card per result. For each, work through three steps: what changed, how much of it was down to your project, and what it is worth.
Real results you can’t honestly turn into money. Report them next to the number, never inside it.
You’re too close to your own numbers. Swap with a partner: each of you tries to knock holes in the other’s figures. The button turns your assumptions and every number you credited into questions they can ask you.
Ask the manager of the people whose work changed. They know what an hour costs and whether the before-and-after numbers are fair. Best done twice: agree the measures and hourly costs before launch, then sign off the result.