In software development, a software project's bus factor (also known as truck factor, or bus/truck number or lottery factor) is a measurement of the concentration of information in individual team members. The bus factor is the total number of key developers who would need to be incapacitated (for example, by getting hit by a bus/truck) to send the project into such disarray that it would not be able to proceed. In this event, the project would retain information (such as source code or other systems) with which no remaining team member is familiar. A high bus factor, where many individuals...