A project rarely fails on the day something goes wrong. The warning signs usually appear much earlier, in a missed allowance, a vague scope note, a late material order, or a timeline built on hope rather than evidence. That is why the preparation stage matters so much. Before work begins, the estimator turns an idea into something the whole team can plan around. They read the brief, test the assumptions, price the work, check the resources, and help shape a timeline that can