The book is concerned with production planning problems arising in the context of make-to-order assembly. After introducing the general decision context, a survey of the relevant literature in the fields of assembly management, make-to-order manufacturing, and project scheduling is given. The main part of the book provides a hierarchical planning approach with three levels: order selection, manufacturing planning, and operations scheduling. The decision problem of each level is carefully elaborated and stated in terms of a mathematical programme. Suited solution procedures such as list scheduling, tabu search, and linear programming are proposed and experimentally tested.