i hv been a progrmmer for a few years most of it self taught, no fancy college stuff. recently our company hired a consultant and he was surprised that i hv not yet created a

functional analysis
program analysis
user manual

of the program

and a lot of other stuff,

we only have 5 employees in our company, everyone knows the program inside out.

my question here is

1. how important are these things and what are these things (except the user manual which i understand)

2. is the consultant just trying to impress my boss

3. what other documentations are there which are necessary to be done along with the program?

4. where do i get to learn all this stuff?

any help is welcome

thanks