---
alias: user-guide-edit-data-point
search:
  boost: 1
---

# Edit Data Point

:lock: ChartDataPoint.**Edit**

## Overview

This operation is used to Edit the individual reading values of an existing **Chart** Data Point.

## Setup

No specific setup is required other than to meet the preconditions of the transaction.

## Preconditions

1. The **Chart** exists in the system and it is Active.
2. The **Chart** Data Point exists in the system and it is Active (Universal State).
3. The **Chart** Data Point is not aggregated.

## Sequence of Steps

### Step 1

1. In the Logical Chart, select the **Chart** Data Point you want to edit.
2. Select Edit Data Point to open the Edit **Chart** Data Point wizard.
3. Edit the reading values as needed.

    !!! note
        The reading values must comply with the following:

          - Values must be within the range defined in the Parameter definition (minimum and maximum allowed values).
          - For Variable charts: the number of readings must be greater than or equal to the Minimum Sample Readings and less than or equal to the Maximum Sample Readings defined for the Chart.
          - For Attribute charts: the number of readings is one.
          - For p (Fraction Defective) and np (Number Defective) charts: the reading value must be between 0 and the Sample Size.
        
        For more information, see [Chart Types](../chart-types/index.md)

4. Optionally, enter a comment.

    !!! info
        If a comment is entered, it is stored as the Annotation of the Chart Data Point. For more information, see [Annotate Data Point](./annotate_data_point.md).

5. Select **Save** to complete the operation.

![edit_chart_data_point][edit_chart_data_point]

[edit_chart_data_point]: ../images/edit_chart_data_point.png

!!! info
    Once saved, the System State of the data point is updated to Edited.