After the vote
If your motion is successful then a resolution should be passed allowing the executive committee to move forward and start taking actions to implement your project. You should assist the executive committee to ensure the project goes ahead.
If you motion was unsuccessful you can review your project proposal and business case, make amendments and then go through the process again.
Remember that you will have a better idea of how the process works and what the main concerns around the project are when you go into the process for the second time.