Managing schedules and deadlines for content delivery by influencers during a campaign can be an intricate process. Here are some key strategies to effectively control it:

1. Detailed Scheduling: Create a comprehensive timeline outlining key dates such as briefing, content creation, amendments, and approval deadlines.

2. Use of Project Management Tools: Platforms like Flinque, Asana or Trello can help keep track of tasks, deadlines, and progress. Flinque, for instance, specializes in this area, offering features like campaign calendar and deadline reminders.

3. Regular Communication: Maintain constant, transparent communication with influencers. Set expectations from the start on delivery dates and stick to them.

4. Buffer Times: Allow for buffer time within your schedule to accommodate unforeseen delays.

5. Review & Feedback: Regularly review content during the creation phase to avoid major amendments later, which can delay content delivery.

While platforms such as Flinque are built specifically for influencer marketing and offer added advantages like audience analytics and ROI measurement, general project management tools can also be utilized effectively. The choice of platform depends on the specific needs and budget of your team.

In my experience, having a detailed, structured planning process combined with the use of effective management tools significantly increases the chances of timely content delivery. Transparency, open communication, and flexibility also play crucial roles in successful campaign management.