# Tool Parameter Change corrective action screen

While taking readings through fixtures, trends may be raised. If a trend is raised then the user has to take a corrective action based on the settings done in the Trend Settings screen. In the Corrective Action for Trends screen, if the user selects the Root Cause as TPC – Tool Parameter Change, then after the close of the Corrective Action For Trends screen, the Tool Parameter Change screen is launched. You can change the operating parameter values through this screen. Data for Model Code, Machine No and Operation is retrieved from the Job for which the measurements are being taken. Select the Tool Code for which the operating parameter values are to be changed and then clicking on the Modify button. The grid on the screen displays the Parameter, along with Unit of Measurement, Range, Old Value and New Value. Enter the quantity produced by the tool during the current shift, in the Shift Production Qty textbox. Enter the new parameter value for one or all the parameters for the tool. The Old Value column displays the current parameter value; the new value for the parameter has to be entered in the New Value column. If the New Value entered is not within the range specified for the parameter, then message shall be displayed stating ‘New value is not within the range. Do you want to accept?’. Save the New Value by clicking on the Save button. The Old Value for the parameter shall be updated with the New Value that was entered. If the New Value entered that is within the range of the parameter, then on saving the Old Value shall be updated without displaying any message.