# Control charts (Levey-Jennings) - HCP

## Contents

## Control Charts Overview

This is an **Administrative** function rather than a standard lab operation. Only users with **Lab Manager** profile have this on their menu and may access it.

HealthCloudPOL enables you to produce control charts from laboratory data. The system provides the laboratory with the ability to perform statistical calculations and charting of testing/quality control data using queries and limit updates. You can produce control charts from:

- Calculation Inputs
- Limits
- Limit Sets

## To View Laboratory Data

The Control Charts Main List screen displays Control Chart information currently defined in the system. When you access this screen, the system prompts you to filter the Control Charts using the Control Chart Main Filter window.

You can click **OK** in the filter to bring back all records ("Cancel" brings back zero records). Or you can enter any filter criteria into the fields of the "Filter By" and/or "Order By" areas to filter the results, then click **OK** .

The system displays the results in the **Control Charts Main List** screen.

## To View Control Chart Sample Data

On the **Control Chart Main List** screen, click a **Specimen**. The system displays the sample details on a new screen.

Click the **Forward** button to view the next sample, or click Done.

*Note: Delete button may display, but is disabled. Export function is better suited to multiple sample data.*

## To Export Control Chart Data to Excel

To export Control Chart data to Excel, click the **Export** button from the **Control Chart Main List** screen.

## To Calculate Statistics

On the **Control Chart Main List** screen, select the data samples for which you wish to calculate statistics. You may also click **Select All** .

Click **Calculate**. The system displays the statistical data in the fields above the **Control Chart Main List**.

## To Display Quality Control Limits

On the **Control Chart Main List** screen, select the data samples for which you want to display QC Limits. You may also click **Select All** .

Click **QC Limits**. The system displays the QC Limits screen for the selected sample data.

## To Modify Calculation Inputs and Limits

On the **QC Limits** screen, complete the Calculation Inputs fields, as necessary.

**MIN**- Type the minimum calculation input.

**MAX**- Type the maximum calculation input.

**SUM**- Type the data sum calculation input.

**COUNT**- Type the sample count calculation input.

**MEAN**- Type the data mean calculation input.

**STD**- Type the standard deviation calculation input.

On the **QC Limits** screen, complete the Limits fields, as necessary.

**Lower Limit**- Type the Lower Limit.

**Lower Warning Limit**- Type the Lower Warning Limit.

**Upper Limit**- Type the Upper Limit.

**Upper Warning Limit**- Type the Upper Warning Limit.

Click **Update QC Limits**. The system displays the data with the changes that were made.

# To Add or Edit a Limit Set

In the **Limit Set** area on the **QC Limits** screen, select either the new Limit Type or an existing Limit Type.

Complete the fields of the **Limit Set** area.

**Limit Type**- Select a limit type from the drop-down list.

**Operator**- Select a mathematical operator from the drop-down list.

**Limit Value**- Type the limit value.

**Formula**- Click the link to build a formula using the Add/Edit Limit Formula web page dialog.

**C (Chart Limit)**- Select the checkbox to include the limit in the chart output.

## To Graph Control Charts Data

In the Limits area on the **QC Limits** screen, click **Graph**. The system displays the graph of the selected data.

In the **Control Charts Main List** screen, after selecting the records you wish to graph and clicking **Calculate** , then click the **Graph** button.

The Control Chart graph of selected sample results is displayed: