I also have had an issue in the past with my senior project when it came to the Critical Path. During my senior project a lot of the group members thought we knew how to run simulations and so we accounted for it only taking up maybe three days at most. However, when we finally came to this step, we didn’t realize how complex the geometry of project was, and so this definitely took more than the time we accounted for. This involved getting help from our professor, learning the software more extensively and making sure we’re using the right boundary conditions and constraints. Basically, what I learned is that getting your teammates to actually learn the software or basis of a procedure could actually contribute to a lot more time than expected and can actually be considered a step on the critical path.