Application of Phase Analysis in the Production of Cleaning Production Home Industry in North Labuhan Batu Regency

3. Calculating Upper Control Limit (UCL)

Upper Control Limit is calculated by the formula:

Dok. pribadi

Information:

p-Bar: Average product non-conformities

n: The amount of production per group

4. Calculating Lower Control Limit (LCL)

Lower Control Limit is calculated by the formula:

Dok. pribadi

Information:

p-Bar: Average product non-conformities

n: The amount of production per group

Based on production data for 1 year (November 2019 - October 2020), the calculation of the upper control limit, lower control limit, and center line is made in 1 Control p-Chart. The main data in this study are monthly notes which are used as samples for observation and for products that are damaged (defective). Control p-Chart shows changes in data over time, with the inclusion of maximum and minimum limits which are the boundaries of the control area.