One of the main offenders that make a person miss a deadline is lack of preparation. Most workers or specialists handle various projects. They have many deadlines to follow. some strengths are long-term deadlines while others might be short-term ones. Shortness of motivation can occur if the employees are tired of the system or the deadlines are recognized as unworkable or there are too many interdependencies to meet the deadlines.
These are the points that motivate your team to meet deadlines!
Work in milestones. When possible, break up the larger project into several smaller pieces, and set deadlines for each milestone.
Give immediate recognition.
Provide early completion incentives.
Give over ownership.
Refuse to nag.
Be motivated yourself.