Someone taught me, years ago, some technique (don't remember the name) where you would move all the tasks to begin in the last possible day. Then, study the cr

Someone taught me, years ago, some technique (don't remember the name) where you would move all the tasks to begin in the last possible day. Then, study the critical path to exclude all those "extra fat" that everybody includes in each task, assuring that the critical path is really critical, without hiding days/hours that would lead to procrastination in the critical path. Save it to an "emergency buffer". Review if something else became the critical path. Repeat until stability arises. Now, manage it, use your buffer when required, always take care if something else becomes the critical path (as everything will begin in the last possible time). And, even if something becomes critical path and takes more time than required, you have some buffer...