> SOME parts still could have been shared between the different aircraft Maybe it's just too much time with software talking, but this feels like the intuitive

> SOME parts still could have been shared between the different aircraft Maybe it's just too much time with software talking, but this feels like the intuitive approach. If you have one task with three cases, use a standard frame and customize the part that changes. But if you have three distinct tasks, plan for three approaches and pull out common requirements into a shared pool - whether that's a utility class or a parts depot. Doing requirements-first designs for each role and then looking for opportunities to standardize some parts might get you an unpredictable amount of savings, but it'll save some money and get you three working planes. Doing standardization-first design and hoping you can customize for each role after gets you... about half a plane and a broken budget, apparently.