daily, weekly, etc. | ambitious, busy, demanding, gruelling, heavy, hectic, punishing, tight | rigid, strict | business, production, training, work, etc. | flight, television, etc.
disruptions to flight schedules caused by the strike

have, work to
She has an very demanding schedule.

arrange, design, draw up, plan, prepare | amend | be/go according to, keep to, meet, run to, stick to
At this stage everything is going according to schedule. | We had to work a lot of overtime to meet the strict production schedule.

be/run ahead of | be/fall/run/slip behind | interrupt, take time out of
The president took time out of his busy schedule to visit our school.

in the ~
Allow time in the schedule for holidays and illness.

on ~
The project is right on schedule.

currently | originally
The meeting was originally scheduled for March 12th.

provisionally, tentatively

for
The film is scheduled for release next month.

be scheduled to begin/start/take place
The Grand Prix is scheduled to take place on July 4th.