The phrase "aggressive timetable" refers to a plan or schedule that is very demanding and requires quick or speedy completion of tasks. Full definition
Belfiore's blog post set an even more aggressive timetable, claiming that customers would be able to buy a PC with Windows 10 S mode at or near the time when the next feature update to Windows 10 drops. (pcworld.com)
Hard to say, but a month isn't long and you might be able to reverse diet on a more aggressive timetable (100 - 150 cals per week). (coachcalorie.com)
Several congressional Republicans on board with repealing the ACA have balked at the aggressive timetable, arguing that swift action shouldn't happen before a comprehensive plan is in place. (inc.com)