MII is the second generation of the Micro-Computer Aided Cost Estimating System (MCACES). It is a detailed cost estimating software application. MII is one of several applications of an integrated suite of cost engineering tools called the Tri-Services Automated Cost Engineering System (TRACES). It interfaces with other PC based applications used by the Department of Defense Tri-Service Cost Engineering Community of Practice (COP).

MII provides an integrated cost engineering system (software and databases) that meets the US Army Corps of Engineers (USACE) requirements for preparing cost estimates. It is a requirement for the DoD Cost Engineering COP.