Attaching Reason Trees to Waste Locations

Reason trees are applied to waste models to identify where the waste event came from and the reason for the waste. One reason tree can be used for both waste and downtime events.

Each waste detail can have a Cause Reason and an Action Reason. These reasons are details on what, where, and why the waste event occurred and what was done to correct it.

These steps assume that you have configured a Waste event on a production unit.

To attach reason trees to waste locations

  1. Expand Plant Model, browse to the desired production unit, right-click and select Detect Events on <production unit name>. The Event Detection wizard appears.

  2. Select the Waste event under Configured Models and click Edit.

  3. Click the Waste Locations tab to associate reasons to the waste event.

  1. Select the production unit. A message box appears asking if the waste event is time-based.

  2. Click Yes or No. The type of waste event is automatically entered under the Association Type column. The Tree Selection dialog box appears and three buttons are displayed on the toolbar: Assign Cause Tree, Assign Action Tree, and Enable Research.

  3. Select a reason tree and click OK. The selected reason tree is listed under the Cause Reason Tree column.

  4. Click Assign Action Tree to assign an action reason tree. The Tree Selection dialog box appears.

  5. Select a reason tree and click OK. The selected reason tree is listed under the Action Reason Tree column.

NOTE: If you need to create a new action or cause reason tree, click Manage Trees. The Tree Builder dialog box appears where you can create new reason trees.

  1. optional: Click Enable Research. Enabled is displayed under the Enable Research column. Enable Research will enable the Research tab in the Sequence of Events display for waste events. Enabling research allows the user to identify a site user as the person responsible for researching the waste event and to set the research as closed or open.

  1. Click the Fault Translation tab to associate a fault to the waste event.

  1. Click Add. A new row is added under Fault Translation For Detection Model Output.

  2. In the Fault column, type a fault value. The fault value must match a value that will be returned by an historian tag (if using model 200) or a fault value identified in a script (if using model 210 or 211). Fault values must be unique on this production unit.

  3. In the Fault Name column, type a name for the new fault. Fault names must be unique on this production unit.

  4. Select the production unit from the Location list. If the production unit has child units configured, the production unit and its child units will be available in the Location list.

  5. In the Reason1 column select a reason from the list. The contents on the list will depend on the reason tree selected on the Cause Reason Trees tab. Depending on how the reason tree is configured, you may select subsequent reasons for Reason2 through Reason4.

  1. Click the Conversion/Types tab to add units and conversion factors to the waste events.

  1. Click Constant, type a description in the Name box and type a conversion value in the Value box. The conversion value is used to convert the waste value to the correct unit of measure used for waste events for a specific production unit.

    – OR –

    Click Specification, to assign a specification variable value as the Value entry. This allows for the use of different conversion factors on a product-specific basis for a given name.

  2. Under Waste Types, type a new waste type. Waste types describe the various types of waste that can occur and can be selected or automatically used to define the type of waste that is being measured or calculated for a waste event.

  1. Click the Reason Shortcuts tab to create a shortcut for use on the Waste display.

  1. Click Insert Input. A new row is added.

  2. Under Shortcut Name, type the name of the shortcut. This name will be displayed on the right-click menu in the waste display.

  3. Under Time, type the duration, in minutes, of the waste event. When the shortcut is applied to a waste event in a waste display, this will become the amount of waste for the event.

  4. Under Location, select the production unit.

  5. Under Reason Level 1 – 4, select the reason levels to apply to the waste event in a waste display. The available reasons are determined by the cause reason tree selected in step 5a.