Ideas for Building to Spec

I wondered if any builders out there have ideas on what needs to be included in a specification for an object. I have a couple of people willing to develop objects, and I would like to establish a business-like format for passing ideas to them that they can work from.

So far, I think an Object Spec should probably include the following information:
- description of the object
- an idea of how it should look
- functionality (to be achieved with scripting)
- any texture requirements
- external interfaces (whether it needs to talk to anything outside SL)
- animation requirements

Is there anything I'm missing? If you had all this information, would you still have questions about how you should go about constructing something?

I realise this is all quite abstract, and limits the creativity of the developer somewhat, but the idea is to be able to get something quite specific built with the minimum of misunderstanding and rework.
Any feedback greatly appreciated!

Thanks
Atwood

Just as a point of view,

If somebody came to me with that level of build I would charge the EARTH.

why ?

Because what your asking for isnt really a builder... or prim thrower

you asking for
a designer
a scripter
a prim thrower
a texture creature.

There are some that can do ALL well, there are some that can do SOME well and there are some that can do MAYBE one or two well. But to put it objectivly if you were to ask for that level of a builder to have all thsoe skills to a high level then pretty much theres nothing stopping them doing it all themselves *s* and bypassing the requester.
Building is easy, scripting the build is slightly harder.

But again ..depends on the builder. ... from what ive seen there are some out there that have skills beyond belief.

Marty