A kit is a prepackaged group of parts to repair or build something. For example, a bag of O-rings, gaskets, and springs are used to rebuild a carburetor, or a Ziploc bag of bolts, washers, and blind nuts are used to assemble a bookcase.
In ALERE, a kit is a single-level bill of material defined as a Kit type BOM. When a kit is on a sales order and is shipped, ALERE performs a unique process. It checks to see if the kit is in stock. If it is, it ships it. If the kit is not, or there is an insufficient quantity, then it will automatically issue the components, place the required number of kits in stock, and then ship them.
A super kit takes the process a step further. It allows you to choose which components go into the kit and in what quantities. Any components that have a quantity of zero are not included in the kit. This is an amazing function, with many applications, as it literally allows kits to be constructed on-the-fly!