Some projects involve a lot more infrastructure work than coding. Typical example (my current project): setting up a resque/redis queue monitored by god/monit w

Some projects involve a lot more infrastructure work than coding. Typical example (my current project): setting up a resque/redis queue monitored by god/monit with a simple sinatra front-end (that is less than 100 lines long). A large part of estimating errors comes from forgetting an area that requires work (eg: in code, deployment, documentation, staging/feedback/iterating...).