When I was in construction, we had a paper flow chart that had horizonal
lines for WHO and for HOW LONG. First day of construction (April 1st) was
for the earth movers, (7 days) Just underneath that was the survayors.
(Started on the 5th day of earth movers and lasted 4 days) Then came the
trenchers to put in the underground piping (April 8th, for 3 days),
Electricians (April 8th 4 days)

If you get the gist of the chart, is there one out there that will simply
show this?
BTW, the bars were colored and you could see at a glance as to what was
supposed to be happening on any given day.