The Common Distribution Charging Methodology or CDCM
The CDCM is schedule 16 of the DCUSA.
A DCUSA document containing schedule 16 is available for public download from the DCUSA website http://www.dcusa.co.uk/.
The first two paragraphs of schedule 16 read as follows:
1. This Schedule 16 sets out the Common Distribution Charging Methodology (CDCM), which gives the methods, principles, and assumptions underpinning the calculation of Use of System Charges by each DNO Party (except where the DNO Party is acting as an LDNO).
2. The Schedule 16 comprises two main parts. Part 1 describes the cost allocation rules. Part 2 describes the tariff structures and their application.