...but if you can do data entry, Google is probably beyond you too
And you'd be right. A search for Ramsey's formula dredged up a
farcical formula courtesy of Pitcavage.
Marc Blume does have a
calculator from 2013 on his
Alpenfestung site. It's similar, though slightly less refined than the one Michael Rodgers provided upthread. Marc concluded that roughly two-thirds "of all variability in playing times can be predicted by the Scenario Size." The remaining third could be attributed to the players involved and their environment.
Marc backed up his conclusion with a regression line, which I take to mean a line representative of estimated playing time (based on the 2013 calculator) in relation to where actual play times fell on the plot.
If correct, then there is a moderately positive correlation between estimated scenario time (based on raw scenario variables such as units and numbers of turns) and actual play time.
If a crude formula can produce this level of correlation, what would it take to nudge this correlation above 70%, into even more positive territory?
Edit: I plugged in the numbers for
Nor Will Deep Hell Receive Them into Blume's calculator. (Blume credits Luke S and M Rogers [
sic] for helping improve the calculator.) It spat out 6 hours and one minute, which tracks with the Archive estimate of 6 hours.
Recall that Michael Roger's formula that I tested earlier gave me just under 5 hours for the same scenario. The discrepancy isn't surprising considering that the Blume formula includes SMC, which are given the same weight as a squad. My gut tells me that even if one ignores the pre-game setup time (e.g., rubble/Debris generation), the scenario could easily run to 6 hours once one accounts for the additional reinforcements that need to be purchased and entered on 7 subsequent Player Turns! (While the units were factored into the equation, purchase-and-pull time wasn't.)