Look at the following broken-line graph (Figure #1). How much time do you need to create one? 5 – 10 minutes? How about two days?
Figure #1 (Click to enlarge)
Now, if I provide an estimate of two days for creating a graph, my Customer will expect to receive a 3D visualization, in color. Then, where is the problem? Why creating a graph with a few broken lines might take that much time?