As stated by previous responses R&D would be a factor that extends the Gantt Chart and timeline of the project. However, another important aspect of the balloon system popping immediately may cause upper management to re-evaluate the project entirely. This would be a major setback to a project of this magnitude and something that would have been addressed before deciding to even start the project. If the balloon system was not able to meet the requirement of 10 days by even 10% it is likely that this project would have never received the go ahead to begin, since R&D is usually never this far behind before the initiation of a project.