Meaning
Performance indicators that track the ratio of time a machine is ready for production against the total planned time provide a measure of operational health. Equipment availability metrics are used to identify the impact of unplanned breakdowns and setup changes on the factory capacity. This data is a core component of the overall equipment effectiveness calculation used in lean manufacturing.
Uptime Calculation
Calculation of the available time involves subtracting the duration of all repair and maintenance activities from the scheduled operating hours. Equipment availability metrics exclude planned downtime like holidays or lunch breaks to focus on the reliability of the hardware. The resulting percentage shows how well the machine is performing.
Operational Impact
High values for the indicators suggest that the production line is capable of meeting its targets without frequent interruptions. When the equipment availability metrics drop below a certain threshold this trend often indicates a need for more frequent service or a change in the operating procedure. This visibility helps managers to allocate resources to the areas where they will have the most benefit.
Maintenance Evaluation
Duration of the repairs is tracked alongside the frequency of the failures to determine the speed of the service response. By analyzing the equipment availability metrics over time the factory can see if the preventive maintenance program is actually reducing the number of breakdowns. This loop ensures that the cost of service is balanced against the value of the production time.
