Starting from January 2013, the Component Cost Index of the Mechanical and Electrical Works is based on the revised base year which has been changed from (December 2007) to (July 2012=100). The unit price indices are reported according to three (3) regions, that is Peninsular Malaysia, Sabah and Sarawak.

The specifications of the selected mechanical and electrical components are determined by Public Works Department (JKR) and Construction Industry Development Board Malaysia (CIDB). The prices are obtained from the price collection conducted by Department of Statistics, Malaysia.