The objective of the study reported on was twofold: (1) to develop a comprehensive procedure for evaluating and comparing equipment used to effect size reduction of municipal solid waste; (2) to compile an inventory of current manufacturers and users of such equipment. The report is intended for use by administrative personnel (or other equipment purchasers lacking a technical background). Volume I discusses the role of size-reduction equipment in solid waste management, general guidelines for developing a basic design for a size-reduction facility, a reliable numerical rating procedure, and test procedures to be used. Volume II provides a discussion of information sources for the inventory, data sheets from each responding manufacturer and supplier, and a listing of solid waste processing or disposal facilities that use size-reduction equipment in their system.