The critical chain focuses attention on managing

the buffer activity durations and the resources available for the planned activities.
To ensure that activities are planned for duration, the critical chain schedules planned activities according to the earliest possible start and completion dates.59 What information does the project manager initially need when preparing the initial cost estimate for the project: verification of the estimating process. Cost management plan. Available historical data from the Education City IT Channel Information Systems Project Manager Question Bank. Bottom-up estimating.