I recently started a co-op at a large retail organization and was working on my first real assignment, which involved trying to find a way to improve accuracy of a model (I dont want to get much more detailed, but i know that's not very clear lol). I spent the day trying out a few methods, testing, gathering results, etc, but all of the things i tried, including things suggested by my manager, either performed the same or marginally better, and didnt really accomplish the large scale goal we were trying to achieve. I was truly working and actually "doing stuff," so i wasnt slacking off, but it doesn't feel like I have much to show for it. Is this normal or did I do something wrong/do "bad" DS? I know stuff like this is iterative, but I'm wondering if things like this are supposed to be quick and I moved too slowly.