BEATO (sometimes spelled BeATo) stands for "BEnchmark Assessment TOol". BEATO is both a tool and a methodology, originally dedicated to Security assessments. It determines the quality of controls as well as the degree of compliance using a Capability Maturity Model.
BEATO's uses include compliance assessments relative to ISO Standards (specifically ISO 9000, ISO/IEC 20000, ISO 27000).
Both methodology and tool have been developed by Unisys for internal use in 1999 (Y2K compliance). Since 2002 BEATO has been marketed to Unisys clients.
The PLATO Risk Management sub-module (PLAnning TOol) was designed to answer the question if poor controls have consequences big enough to warrant investments.