As indicated in Figures 1 and 2 , there were five working groups established within the DTP group to promote an efficient development process by dealing with specific subjects of the test procedure : ( a ) Laboratory Procedures for Internal Combustion Engine vehicles ( LabProcICE ) to work on the road-load determination and test procedures in the testing laboratory for conventional vehicles ; ( b ) Laboratory Procedures for Electrified Vehicles ( LabProcEV ) to work on all test procedures that specifically address electrified vehicles ; ( c ) Particulate Mass/Particle Number ( PM/PN ) to work on test procedures for the determination of particulate mass and particulate numbers in the exhaust gas ;