The Japan International Cooperation Agency (JICA) has rated the DMRC's implementation of its first phase of construction as excellent in a study conducted recently.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/jicas-excellent-rating-dmrc-phase-i-project
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/japan
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-metro-rail-corporation-dmrc
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electricity
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bureau-indian-standards-bis