This book has been made possible by a sea of efforts. Collating this book was a labour of love. I share the topic of Decision-making support systems with the reader with a sense of zeal and oceans of enthusiasm. I think that these attributes are reflected in this book and perhaps make it better. I wish to thank Sophie Tergeist from Bookboon Ltd for her guidance and Shafaqat Hussain for designing the cover of this book. Each chapter in this book was subject to a previous peer-review process. I specifically thank the following for granting me permission to use some of my previously published work:.