ISO 22400 defines a structured set of KPI domains for manufacturing operations, mainly focused on discrete and batch production. The intent is to organize KPIs so that MES, automation, and enterprise systems can describe performance in a consistent way.
Core KPI domains in ISO 22400
Across the ISO 22400 series (especially ISO 22400‑2 and 22400‑5), the main KPI domains can be summarized as:
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Resource utilization
KPIs that describe how effectively production resources are used, including:
- Equipment utilization and availability (e.g., OEE-related measures)
- Labor utilization (direct / indirect labor effectiveness, attendance)
- Material utilization (yield, scrap, rework rates at the resource or line level)
- Energy and utilities consumption per unit, per order, or per resource
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Manufacturing time and throughput
KPIs that characterize timing and flow, for example:
- Production lead time and order cycle time
- Processing time vs waiting/idle time
- Schedule adherence and execution reliability
- Throughput rates at equipment, line, or plant level
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Manufacturing quality
KPIs describing conformance and defect behavior, including:
- Yield and first pass yield at different aggregation levels
- Defect and nonconformity rates (internal, external, by resource or order)
- Rework and scrap impact on capacity and flow
- Capability-related KPIs derived from process data (where available)
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Cost and efficiency
KPIs linking operational performance to economic impact, such as:
- Cost per unit or per order (when supported by reliable cost allocation)
- Energy cost per unit, line, or resource
- Cost of non-quality and rework, where traceable to operations
- Productivity measures combining labor, equipment, and output
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Order and delivery performance
KPIs focused on meeting committed plans and demand, for example:
- On-time completion / delivery against requested or confirmed dates
- Adherence to production schedules and frozen plans
- Reliability of start and finish times for manufacturing orders
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Maintenance and availability (closely related domain)
While maintenance can be treated as its own discipline, ISO 22400 includes KPIs that link maintenance behavior to operations, such as:
- Mean time between failures and mean time to repair
- Planned vs unplanned downtime and their impact on availability
- Maintenance-related losses contributing to OEE
Dependencies and implementation constraints
ISO 22400 specifies concepts and formulas, not a turnkey KPI system. Which domains you can realistically implement depends on:
- Data readiness: Many KPIs need aligned order, resource, and time-event data from MES, automation, and ERP. In brownfield plants, missing or inconsistent timestamps, manual workarounds, and partial routings can limit which domains are practical.
- Integration quality: Cross-domain KPIs (for example, combining cost, quality, and time) require stable interfaces between MES, ERP, QMS, and maintenance systems. In mixed-vendor stacks, this may be the gating factor.
- Validation and regulated use: In regulated environments, KPIs used for decision support that may influence validated processes must be traceable, versioned, and change-controlled. Formula changes, data-source changes, or aggregation logic often require impact analysis and documentation.
- Asset lifecycle and downtime constraints: Instrumenting legacy equipment to support time, utilization, or energy KPIs can be constrained by downtime windows and qualification burdens. This often leads to a phased rollout by resource family rather than plant-wide deployment.
Many sites adopt ISO 22400 domains as a reference model for structuring KPIs, while keeping existing local definitions in parallel. Full replacement of existing KPI sets by the ISO definitions is uncommon in regulated, long-lifecycle environments because of historical baselines, trend continuity requirements, and the validation effort to re-baseline metrics used in quality or regulatory reporting.
