A standard is any guideline established as the basis for measurement. It is a precise, explicit statement of expected results from a product, service, machine, individual, or organizational unit. It is usually expressed numerically and is set for quality, quantity, and time. Tolerance is permissible deviation from the standard. Time controls relate to deadlines and time constraints.
Material controls relate to inventory and material-yield controls.
Equipment controls are built into the machinery, imposed on the operator to protect the equipment or the process. Cost controls help ensure cost standards are met. Employee performance controls focus on actions and behaviors of individuals and groups of employees. Examples include absences, tardiness, accidents, quality and quantity of work. Budgets control cost or expense related standards.