Estimating how long it will take

Kulharin posted a good question in the official forums: On average, how long does it take to create an average module.

I was curious. I don't know a heck of a lot about the toolset beyond the basics... But I think I am interesting in creating an average sized module with a few areas. maybe a town or two, a few outdoor areas and a few dungeons ... With a bit of custom 2DA content and monsters .... How long roughly would it take to create a basicly average module.

Rob McGinnis was kind enough to give a quick answer based on their experiences:

For the layout of areas (art only, including props)

Exteriors:
Tiny - 3 days (24 hours)
Small - 5 days (40 hours)
Medium - 8 days (64 hours)
Large - 15 days (120 hours)

Interiors:
Tiny - 1 day (8 hours)
Small - 2 days (16 hours)
Medium - 4 days (32 hours)
Large - 6 days (48 hours)

For Design (writing the story, working out encounters), here are our numbers for Mask of The Betrayer.

Module A (The Barrow)
Avg. Gameplay (minutes) - 75
Implementation Time - 59 man days
# Tiny Areas - 0
# Small Areas - 3
# Medium Areas - 2
# Large Areas - 0
# Designers - 1

Module B (Mulsantir)
Avg. Gameplay (minutes) - 240
Implementation Time - 112 man days
# Tiny Areas - 6
# Small Areas - 4
# Medium Areas - 2
# Large Areas - 2
# Designers - 3