He projected his own schedule, but he tunneled, as he did not forecast that some “external” events would emerge to slow him down.
We can project our own schedule, but not outside events. For instance, I'm motivated to jog each morning, but my knees are preventing me from jogging as much as I'd like.
I knew something would start hurting, but I didn't know what or how much effect it would have. I did overestimate how far I could run before something started hurting.
I also underestimated how difficult it would be to cut the lawn.
