Critical Chain Project ManagementAlmost all projects fail in terms of time and cost, but it's not because we don't plan carefully enough, but rather because we plan to fail. The main reasons for poor planning are:1. We plan to assume that our project will not change in scope, but that is still the case. You will never find a project whose scope never changed during the project phase. At best the change was minor, but usually changes are large enough to impact your project. The question is: if we know the plan will change, why do we plan assuming it won't?2. Tasks finish after the deadline or, in the best case, on the last day: a project is made up of tasks and the probability that the tasks finish before the deadline is zero, which means that the probability that a project ends before or before the deadline is also void. . This is due to 2 main factors:a. Student Syndrome: As students do, if I know I have enough time, I will start my tasks after the project begins (i.e. if I have 10 days to complete a task but I know I can do it in 5 days, I will probably start on day 3, 4 or 5, which means I will eliminate the safety stock of my tasks and I will, in the best case, be able to finish this task on the last day (if nothing happens)b slowest: When you look at how people progress with their project, they usually get to 80% completion of a task very quickly, but take much more. time for the last mile When people start early and quickly reach the "80%", they tend to relax or if they know they could finish earlier, they spend more time than necessary improving. details that aren't really necessary or are just waiting until the last day to complete their tasks. Additionally, people don't tend to finish ahead of schedule because when task schedules are negotiated, managers demand less time and employees need to have safety stock because they don't want to be punished for their delay. If they happen to finish a task earlier than expected, they will send the message to their managers that they could have finished earlier and that they will not benefit from additional time in their next negotiation.” Even though one might think "this won't happen to me and my project", just look at the facts..