I work with modular shelving units and use design tables alot. They allow me to quickly generate several different stockroom capacities for a customer by choosing different configurations of the shelf assemblies within a stockroom assembly.
To start at the beginning, I first use a design table with each part to create every size of that part we use (like posts at 72", 84", 96", 120" and 144").
Next I open an assembly drawing and build a shelf unit using one configuration of each part (say an 18"x48" by 96" tall unit with 4 shelves).
I add a design table to the assembly and create different sized shelving units quickly by specifying different configurations of the parts (ex: I make a 18"x48" by 120" tall unit with 5 shelves by changing the configuration of the posts in the design table from 96" to 120" and changing the number of instances the shelf is patterned from 4 to 5).
Finally, all this work pays off. I have to design a stockroom layout for a customer by placing different configurations of the shelf assembly on a floor plan. The customer wants us to give them a couple options - say 96"-tall and 120"-tall shelving.
The design tables in the shelf assemblies allow me to quickly generate two different stockroom options by changing the shelf configuration thru each shelf assembly's component properties in the Feature manager tree (just choose the 120"-tall unit instead of the 96" one). Without the design tables and configurations I'd have to lay out the stockroom twice from scratch.
Scott