## Comment This method never fails (Score 1) 191

Here's how to calculate a 100% accurate estimate 100% of the time, when your manager asks you to predict how long it will take to implement feature X:

1. Tell your manager you'll get the estimate for them as soon as you've done the necessary research

2. Go back to your desk

3. Write down the current time

4. Implement the feature

5. Subtract the time you wrote down in step (3) from the current time. This is your 100% accurate estimate of how long it took you to implement the feature

6. Email your manager, and let them know the estimate value. If you're feeling like it, you can also let them know that the feature is now implemented (although this may make them feel like the estimate you gave them is no longer particularly useful, so treat cautiously there)