Process Capability Index (Cpk) Dashboard
Interactive tool to understand process capability and quality control
Understanding Process Capability
The Process Capability Index (Cpk) measures how well a process can produce output within specification limits. It shows how well your process hits the target and stays within limits – the key to quality control.
2σ Coverage
68%
4σ Coverage
95.5%
6σ Coverage
99.7%
Adjust Process Parameters
Process Distribution Visualization
Current Process Capability
Common Cpk Scenarios
Excellent Process
Cpk = 2.0
Process is extremely capable and tightly controlled. Minimal defects expected.
Good Process
Cpk = 1.33
Process is well-controlled and capable. Industry standard for many applications.
Adequate Process
Cpk = 1.0
Process is just capable of meeting specifications. Requires monitoring.
Shifted Process
Cpk < 1.0
Process is shifted with higher risk on one side. Needs adjustment.
Poor Capability
Cpk = 0.77
Process is poorly capable with high defects. Requires improvement.
Marginal Process
Cpk = 0.83
Process is marginally better but still not capable. Close to adequate.