(adjective: slow, sluggish, tardy [to proceed slower than expected]) The progress of this project is too slow and the customer is extremely unhappy about it. Der Projektfortschritt war zu langsam und der Kunde war äußerst unzufrieden. Tiến độ dự án quá chậm và khách hàng vô cùng bất mãn.
công trình 
You have enough work on your hands, let him take charge of this project. 
Du hast bereits genug Arbeit vor dir, überlass ihm die Leitung dieses Projekts. 
project manager, engineer in charge