The Simple node is used to perform simple calculations in the modeling tree.

1. In the Product Model Details form ( Product Builder> Product models> Product model), in the lower pane, right-click the Modeling treenode, point to Newand select Simple node.

   A new node will appear at the bottom of the modeling tree. If you want to insert a node into a particular position in the tree, drag it from the node list displayed on the left.

2. In the Descriptionfield, type a description for the node.

3. Select the variable that will receive the calculation result in the Variablefield.

4. In the lower pane, you can build a mathematical expression – a calculation formula – that specifies the calculation to be performed by the node. The expression consists of one or more lines and each line specifies an operand and an operator. Press CTRL+N to create a new line.

5. In the Typefield, select whether the operand specified on this line, that is, the content of the Operandfield, is a fixed value or a variable.

6. Specify the operand for the expression you are building in the Operandfield. Depending on the choice made in the Typefield, the operand can be either a fixed value or one of your product model's variables. If you specify a variable that is an array, note that you must select the specific array element that you want, not just the name of the variable.

7. In the Operatorfield, specify an operator that connects the current line with the next line to form an expression or a part of the larger expression.

8. Click Testto test the code syntax.

9. Click OKto save the code.