What is Four Ms?

Variables manipulated by a production system with the goal of creating value for the customer.

Meaning and application in management

Variables manipulated by a production system with the goal of creating value for the customer. The first three refer to resources and the fourth to the way those resources are used. In a lean system, the 4Ms mean: Material - no defects or shortages. Machines - no breakdowns, defects or unplanned stoppages. Manpower - good work habits, the necessary skills, punctuality and attendance. Method - standardized processes, maintenance and management.

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