This might be a dumb question and I'm not sure if I should move this to ELL but I would like to know what words/phrases we could use - preferably a single word - for work progress that is behind schedule / on schedule / or ahead of schedule.
Not being a native speaker, all I can think of are the following ones:
The project is lagging behind.
The project is on track.
The project is ahead of our schedule.
What else could we use in place of the bolded phrases? (Hope they are grammatically right. :D)