The marriage of DA and IE seems to fulfill the quest for planned, managed, optimized reuse as neither can do alone. These two disciplines are not only orthogonal but complementary. They have common ancestry and similar backgrounds. Each seems supportive of the other's objectives. Furthermore, each seems designed to fill methodological gaps left by the other. Like any marriage, theirs will require work to truly achieve a union. However, if both parties commit to this union, they stand a good chance of marital success. Their children should turn out to be the high quality efficiently produced software we have been seeking.