>>I would need a grid to show the user that would look like:
>>
>>Task Space Fee
>>
>>Schematic Plan Office $ .50
>>Schematic Plan Warehouse $ .20
>>Permit Drawings Office $ 2.20
>>Permit Drawings Warehouse $ 1.50
>>Field & Input Office $ .10
>>Field & Input Warehouse $ .05
>>
>>
>>
>
>What varies Cont x Space? I see all three involved, or pairs task x space and Cont x Task, but what associates on Cont x Space? Fee is dependent on what's done (Contract x Task) and where - there is no Cont x Space that I see. Cont x Task has a charge made up by ContTask x Space fees. I don't see anything that depends on Cont x Space alone...

I'm not sure what you mean by varies. Each contract has a list of Tasks that can be performed and a list of spaces those tasks are performed in. For each space / task combination there is a unique fee. Different contracts will have a different set of tasks and spaces.

In the expalme above a user does the task "Schematic Space plan" it will always be in both Office and WareHouse.

It's architecural services, if you asked us to design a manufacturing facility for you that consisted of 1,000 Square feet of office space and 50,000 sqare feet of warehouse, we would charge different rates for each type of space.