Chapter 16

Tip #69 

Don't debate the output of an estimate. Take the output as a given. Change the output only by changing the inputs and recomputing.

Tip #70 

Focus on estimating size first. Then compute effort, schedule, cost, and features from the size estimate.

Tip #71 

Reestimate.

Tip #72 

Change from less accurate to more accurate estimation approaches as you work your way through a project.

Tip #73 

When you are ready to hand out specific development task assignments, switch to bottom-up estimation.

Tip #74 

When you reestimate in response to a missed deadline, base the new estimate on the project's actual progress, not on the project's planned progress.

Tip #75 

Present your estimates in a way that allows you to tighten up your estimates as you move further into the project.

Tip #76 

Communicate your plan to reestimate to other project stakeholders in advance.