FREDing is easy if you sit down and you say: 'let's create a bomber mission!' You place down a destroyer, and perhaps a cruiser if you have a mood to do, some enemy fighters, and friendly bombers and fighters. The mission is ready. If you are to follow a storyline, or created a mission which is more complicated, for example you want to make scramble mission when you have to defend two cruisers, who have fallen under attack by a corvette, and you want that corvette to destroy both cruisers with ease, but the two cruisers are stronger than the corvette, and without losses. You cannot change the corvette to a destroyer, because Mr. Projectleader orders you to follow his description of the mission. What's up then?