calculating task time estimates

task-estimate.py

# What's the best guess?
tm = float(input("Most probable Time (Tm) = "))

# If everything goes well, how long would it take?
to = float(input("Optimistic Time (To) = "))

# If everything bad happens, how long would it take?

# Probable time
tp = float(input("Pessimistic Time (Tp) = "))

# Deviation
sigma = (tp-to)/6


te = (to + (4 * tm) + tp) / 6

estimation_low = te - (2*sigma)
estimation_high = te + (2*sigma)


print(te, 'TE' )
print('95.5% == ', round(estimation_low, 4), '<--->', round(estimation_high, 4))