Which category of projects would involve a large number of functional units where the workers may be assigned either part-time or full-time?

Projects that typically involve a large number of functional units where workers can be assigned either part-time or full-time are often found in sectors like retail, hospitality, and event management. These projects require flexibility in staffing to accommodate varying workloads and peak times, such as holiday seasons or special events. Additionally, large-scale construction or manufacturing projects may also fit this description, as they often need a diverse workforce for different tasks and phases of the project.