apply_shewhart_rules {bcc}

Apply Shewhart Control Rules

Description

Identifies points in a control chart that violate Shewhart control rules. These rules help to determine if a process is out of control and requires corrective action.

Usage

apply_shewhart_rules(data, limits, type, sizes = NULL)

Arguments

data

A numeric vector of data values to be analyzed.

limits

A list containing the control limits, specifically the lower control limit (LCL) and upper control limit (UCL).

type

An integer representing the type of control chart. There are two possible types: 1 for discrete data (such as proportions or counts) and 2 for continuous data.

sizes

An optional numeric vector of sample sizes. This parameter is typically required for type 1 charts.

Value

A vector of indices corresponding to data points that violate the Shewhart control rules.

Examples

# Example with discrete data
data_values <- c(0.1, 0.2, 0.15, 0.3, 0.25)
sample_limits <- list(lcl=0.05, ucl=0.25, center=0.15)
apply_shewhart_rules(data_values, sample_limits, type=1)

# Example with continuous data
data_values <- c(0.55, 0.60, 0.65, 0.70, 0.75)
sample_limits <- list(lcl=0.50, ucl=0.70, center=0.60)
apply_shewhart_rules(data_values, sample_limits, type=2)