What employment type allows for hours strictly based on shifts with no regular schedule?

Casual employment is characterized by the flexibility it offers, specifically in terms of scheduling and hours worked. Employees in this type of arrangement do not have a guaranteed number of hours each week, and their shifts can vary significantly. This is unlike part-time or full-time employment, which typically involves a consistent schedule or a predetermined number of hours. In freelance employment, individuals work on a contractual basis, often with more control over their workload, but this option usually requires a commitment to specific projects or clients rather than shifts in a structured environment. Therefore, casual employment is the correct choice as it best describes a work arrangement where hours are assigned based on the availability of shifts and demand without a regular, established schedule.