A type of probability sampling in which sample members from a larger population are selected according to a random starting point but with a fixed, periodic interval.
A contractual relationship between parties, outlining the roles and responsibilities of each party, the scope of work, and the terms and conditions of the subcontract.
Method of analysing qualitative data, applied to texts; in which the researcher examines data to identify common themes, ideas and patterns of meaning that come up repeatedly.
A systematic examination of a set of beliefs and assumptions. Used to gather knowledge about a phenomenon or idea whose conclusions may not have any immediate real-world application.
A specific period of time that is used as a reference point for indicating when an action or event has occurred, is currently happening or will happen.