To have the deliverables ready in time, as a manager, you need to take certain steps and plan ahead. First you need to be a very organized and communicative manager. You need to set deadlines, communicate with the different teams and be able to keep track of progress. I believe the most important step in delivering everything on time is setting deadlines and holding people accountable to them. Deadlines drive and motivate people to work hard towards a goal. It helps them keep focused and in line with what needs to be done. Setting a deadline also lets people know the seriousness of the project or task. Setting deadlines on a frequent basis, with small steps to get done is much more effective than setting further deadlines. These act as little checkpoints in the project and help get everything done before the final deadline.