We create cost estimates at many times in a project. From budgetary estimates at the start of a project all the way to PERT estimates of tasks in a work breakdown structure. Creating a budgetary estimate seems impossible – you have to make many assumptions, your estimates are based on […]
Where Did You Get That Estimate?
How good are our estimates? We can use PERT to estimate the time it will take to implement each requirement. We can use timeboxes to schedule the requirements within each release. If we don’t know how good our estimates are, its an exercise in futility. Scheduling is about more than predicting the future, its about knowing how much faith to have in our predictions.