This book concentrates on the tactical planning level for spare parts management. It describes a series of multi-item stock models and presents precise and heuristic optimization techniques, including greedy heuristics that work well for real, life-sized issues. The desired audience consists of graduate students, starting scholars in the field of spare parts stock control, and spare parts preparing experts in the industry.In individual chapters the authors consider subjects including: a basic single-location design; single-location models with numerous device types and/or device groups; the multi-location design with lateral transshipments; the classic METRIC design and its generalization to multi-indenture systems; and a single-location design with an explicit modeling of the repair ability for unsuccessful parts and the priorities that can set there.Various chapters of the book are used in a master course at Eindhoven University of Technology and in a PhD course of the Graduate Program Operations Management and Logistics(a Dutch network that organizes PhD courses in the field of OM&L). The needed pre-knowledge consists of likelihood theory and standard expertise of Markov procedures and queuing theory. End-of-chapter issues stand for all chapters, with some answers appearing in an appendix.