# The Control Chart

To view this tab, user must select only one parameter by checking in the Chart field on the Readings tab.

In this tab, user is able to view the following charts along with the readings (in samples) on one screen.

Histogram. (For all readings.)

XbarR Chart, X Chart and X-MR Chart (For the No. Of samples selected in the Company Settings.)

Grid with Readings. (For the No. Of samples selected in the Company Settings.)

Following Statistical Analysis is displayed for the selected charts.

Capability Indices – Cp and Cpk values

Specifications – USL (Upper Specs Limit), LSL (Lower Specs Limit) and N (Number of readings)

Out of Specifications – Above and Below (Number of reading which are above and below the specifications)

Max – Maximum value reading

Mean – Average value

Min – Minimum Value reading

DPM – Value gets calculated using SPC formulae. Refer SPC formulae.

Skewness - Value gets calculated using SPC formulae. Refer SPC formulae.

Kurtosis - Value gets calculated using SPC formulae. Refer SPC formulae.

The number of points displayed in the online chart depends on the value entered for display of online points in the Company Settings screen.

Grid column will vary as per the No of samples and the Grid Row will vary as per the Sample Size. When user move the mouse over the Sample in the chart then the corresponding column of grid gets highlighted.

For all Line Charts: To view details of all actual readings for the samples, use the mouse to move the cursor to the points plotted on the chart. The application will display Sample No., Date, Time, Readings for each reading.

Scroll Buttons are provided for scrolling next or Previous Samples. When user move the mouse over the Sample in the chart then the corresponding column of grid gets highlighted.

Cp, Cpk or Pp, Ppk Value {Based on Last Sample No] –

For selected parameter user configure ‘Display Cpk or Ppk value’ to zero then system will calculate the Cp, Cpk or Pp, Ppk for all sample no and for greater than zero then system will calculate Cp, Cpk or Pp, Ppk based on last sample no. Process Status will also display the color depends upon the Display Cpk or Ppk value in Dashboard for last sample numbers.

On delete operation system will check above condition and do the calculation.

Angle Parameter –

If parameter is of type Angle then user tries to move the mouse pointer on Sample then reading will display in both format i.e. Angle & decimal. This is done for X, X-MR, X Bar R and X Bar S Chart.

In grid all the reading value show in decimal rather parameter UOM is angle or not. If user want to see reading in grid as degree then use has to checked Show Angle checkbox otherwise reading in grid will display in decimal.

In case of Histogram chart & its readings will display in decimal whether parameter UOM is angle or Not & Show Angle checkbox will make visible false.

Print Label as CL in histogram. Value of Centerline will be the Nominal value of that Parameter.

Centerline would be red in color and the label would be CL

Mouse Move Facility on range –

If the online chart displayed is XbarR chart and user clicks on the sample in Xbar area then for the sample it displays the following details i.e.Sample no, Xbar, Date, time, Readings. If the user moves the mouse pointer on the sample in Range area then for the sample it displays the following details i.e.Sampleno, Rbar, Date, time, Readings.

If the online chart displayed is XMR user clicks on the X area it displays the following details i.e. Reading, Date, and Time. If the user clicks on MR area then for the sample it displays the following details i.e. Moving Range, Date, Time