If it isn't completed and invoiced by that time, the client loses their funding and you won't get paid. The plan is to have engineering conduct the needs analysis and then write the specifications. When that is completed, two people from systems will select the hardware, software and cables. They will then send the information to purchasing to process the orders. When the order is delivered, installation will begin wiring the offices while systems sets up the server and installs the software.
Installation can then finish the installation by connecting the network.
After the system is connected, it must be tested and debugged before the reports go to management for acceptance. Once the hardware and software have been selected, the training staff can prepare manuals, develop training programs and train the users. The system will be installed and de-bugged, the users trained and the client invoiced before December 31. Time is the driver. Why, because if everything isn't done and billed by December 31, you won't get paid.