Praxis 101: Bonus calculation rule

Let's give our model a name, and create a rules-page

To create our first rule, we drag out a Predicate shape from the palette Click here.

We'll name it "bonus", and fill in the first two arguments with "Age" and "Employed"

Select the field "Rule name", and type "bonus [[tab]] [[tab]] Age [[tab]] Employed"

Click "+" to add an argument - this will be the output argument, and we'll name it "Bonus" Click "Ok"

Click on the background to de-select the shape, so we can see the Palette again

Now we are going to work with Formula shapes, to make our decisions. Type "Employed [[tab]] < [[tab]] 5" Click "Ok"

Copy the shape, paste it, and move the copy where it should be Mark the shape/ shapes you want to copy Press [[ctrl]] + [[c]] Press [[ctrl]] + [[v]]

In this shape we want to allow for the case when Employed is More than 5 years, instead of less. Type ">" Click "Ok" Click outside shape to see Palette.

Drag out a Connection shape from the palette, and connect the shapes to it Connect by dragging from bottom-circles to top-circles.

Continue building the decision-tree, in the same fashion

Now we must complete the other branch, which will contain more decisions

Ok - I just remembered I have to allow for the value 5 of Employed - as it is now, all values but 5 will allow the rule to proceed, but not 5 :)

Enter ">=" instead of ">" here, and we're done

Now we must assign a value to Bonus in each of the remaining branches - otherwise we won't have any answer in those cases Select the Formula shape, and click "+" to add a calculation-row Click this text field. Type "Bonus [[tab]] = [[tab]] 200" Click "Ok"