If you don't want to script your own, Vistimo Quotes lets you do monte-carlo simulation with vague, uncertain estimates; and lets you play with variables like t

If you don't want to script your own, Vistimo Quotes lets you do monte-carlo simulation with vague, uncertain estimates; and lets you play with variables like the number of people working, vacation time, etc. https://quotes.vistimo.com https://quotes.vistimo.com