The assembly line techs drop build time for all units (and many brigades) by 20%. They do not, however, decrease the time for province improvements, nor do they decrease the time to build AA, AT, and Art attachments. Vehicle assembly line decreases the time of SP versions, however.
So we have the odd example of Artillry costing 5/6/7 ICs for 60 days before and after 1940, while SP Artillery costs 7/8 ICs for 70 days before 1940... and only 56 days after. Anti tank is the same - it costs 2 ICs more, but after 1940, take 4 days less to build (60 days vs 70 days -20%). Rocket Artillery and SP rocket artillery aren't quite as bad - 6o days down to 48 for SP vs 50 for regular.
Shall I assume this is WAD? Or an oversight?
So we have the odd example of Artillry costing 5/6/7 ICs for 60 days before and after 1940, while SP Artillery costs 7/8 ICs for 70 days before 1940... and only 56 days after. Anti tank is the same - it costs 2 ICs more, but after 1940, take 4 days less to build (60 days vs 70 days -20%). Rocket Artillery and SP rocket artillery aren't quite as bad - 6o days down to 48 for SP vs 50 for regular.
Shall I assume this is WAD? Or an oversight?