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# Capability Index Calculator Online

The Capability Index Calculator is a valuable tool used in various industries to evaluate the capability of a process to meet specified requirements or standards. It measures the potential of a process to produce output within predetermined limits. This calculator helps in assessing the performance of a process concerning upper and lower specification limits, providing an insight into the process’s efficiency and reliability.

## Formula of Capability Index Calculator

The Capability Index (Cpk) is calculated using the following formula:

`Cpk = Min((USL - μ) / (3σ), (μ - LSL) / (3σ))`

Where:

• Cpk represents the capability index.
• USL signifies the upper specification limit, denoting the highest acceptable value.
• LSL denotes the lower specification limit, representing the lowest acceptable value.
• μ stands for the mean or average of the process.
• σ indicates the standard deviation of the process.
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This formula allows businesses to gauge how well their processes are performing within the defined limits, providing insights into the process’s efficiency and consistency.

## General Terms and Conversion Table

For ease of use, providing a table of frequently searched general terms related to the Capability Index Calculator, such as terms used in calculations or relevant conversions, can be beneficial. This table can act as a quick reference guide, aiding individuals in understanding and utilizing the calculator more effectively.

This table serves as a convenient reference point for users seeking clarification on specific terms related to the Capability Index Calculator.

## Example of Capability Index Calculator

Suppose a manufacturing unit aims to produce bolts with a diameter ranging between 10mm and 12mm. The Capability Index Calculator assists in determining the capability of the production process to meet these specifications. If the mean diameter is 11mm with a standard deviation of 0.2mm, the Cpk value indicates how well the manufacturing process adheres to the specified limits.

## Most Common FAQs

How is Cpk interpreted?

A Cpk value of 1 signifies that the process is capable of meeting specifications, while higher values denote higher process capability. Values below 1 may indicate a need for process improvement.

Can Cpk be greater than 2?

Yes, a Cpk greater than 2 indicates excellent process capability, suggesting minimal variation from specifications.