SPEC Kits were surveys and reports published by the Association of Research Libraries (ARL) from 1973-2018.
"The Systems and Procedures Exchange Center (SPEC) is a clearinghouse operated by the Association of Research Libraries, Office of Management Studies that provides a central source of timely information and materials on the management and operations of large academic and research libraries."
Reports were produced 10x/year, and illustrated how select ARL members were planning for or dealing with particular issues.