You are the project manager of a software development project. Your project team will be creating a web- based software application that will allow your company's customers to browse your website, search inventory, and place orders among other things. Your project team will, on a regular basis, need to update their computer virus prevention software, update their operating systems, and perform other maintenance on their computers in order to complete the project. This maintenance work is not directly tied to the project deliverables, but it is needed in order for the project to be completed. What term best describes this maintenance work?