Explain how you can recover your plan in case that you find it now matching the actual plan.

For this purpose a baseline is saved so that it is always available for reference and comparison. When the project is updated its current status is as per the actual position and the remaining portion shows the probable completion of activities as per the links established for baseline schedule. If the project is being delayed, the links can be revisited, lags can be reduced and/or the duration of activities can be reduced wherever possible by increasing the resources.