We have the same problem with manufactured items. A part number contains a variety of assembled parts, which only come off the stock at the point of 'processing' - that can be days sometimes, meanwhile the stock is well off. This needs to happen at the very start of the order -
The same thing really should be available on Variations also, surely selecting the different items and then selecting 'create variation' would be simpler than scrolling through lists of items seperately??
..and by the way, who thought using a small screen in the corner for inventory searching was a good idea? The whole bottom section of the screen is available, then we wouldn't have to drag the column sizes to read the information!