Almost everyone underestimates how long work takes, and then feels bad about it. Understanding why makes your estimates better and your promises safer.
We estimate the work going well, and forget everything around it: waiting for answers, being interrupted, the thing that breaks, the meeting that eats an afternoon.
Two habits fix most of it. Estimate each small task rather than the whole job, because the small ones are easier to judge and the errors do not compound as badly. And add time for waiting on other people, which is where most delay actually lives.
Your manager asks how long something will take.
What happens: You said the best case out loud and it became a promise. On day four you are explaining, and it looks like failure rather than an estimate.
What happens: The manager now knows what the deadline depends on, and often solves it by getting you the figures. This is a normal professional answer.
Should I add extra time secretly?
Add realistic time openly rather than padding secretly. Say what the estimate assumes. Hidden padding gets found out and costs you trust, while a stated assumption makes you look like someone who has thought it through.
I already know I am going to miss the deadline
Say so as early as you know, never on the day. Early, it is a problem your manager can solve by moving something or adding help. On the day, it is a failure they cannot do anything about, and that difference matters far more than the delay itself.
Before you move on
- Estimate small tasks, not the whole job
- Say what your estimate depends on
- Flag a slip the moment you see it coming
Check what you know
3 questions. Have a look at what this lesson asks.
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