One experience that I had with this was in my undergraduate research. The research I was doing was in collaboration with another lab on campus. The other group with electrospin PLLA based fibers and then I they would send them to me to mechanically characterize them. Doing a collaboration between two groups like this comes with a number of potential delays. There would sometimes be breakdown in communications. The most common experience I personally would experience would be submitting a request for more materials to test which would not be responded to for a week leaving me with very little to do in the mean time.