This book contains a refereed collection of thoroughly revised full papers based on the contributions accepted for presentation at the International Workshop on Studies of Software Design, held in conjunction with the 1993 International Conference on Software Engineering, ICSE'93, in Baltimore, Maryland, in May 1993. The emphasis of the 13 papers included is on methods for studying, analyzing, and comparing designs and design methods; the topical focus is primarily on the software architecture level of design and on techniques suitable for dealing with large software systems. The book is organized in sections on architectures, tools, and design methods and opens with a detailed introduction by the volume editor.