Completing the model

a. Bring up ‘object window’ of ‘Maintenance cost’node.

b. Type ‘$/year’ on ‘Units’ field

c. In ‘Description’ field, type ‘Annual car maintenance costs such as oil changes’

d. Enter ‘2400’ in the ‘Definition’ field

e. Press ‘alt+enter’ to accept

f. Bring up ‘object window’ of ‘Total cost’ node.

g. Type ‘$/year’ on ‘Units’ field.

h. Type ‘Total annual cost of driving and maintaining a car’ in ‘Description’ field.

i. On ‘Definition’ field, click ‘inputs’. Select ‘Fuel_cost’. Key in ‘+’ sign. Click ‘inputs’ again, this time select ‘Maintenance cost’

j. Click Result button to evaluate total cost.

k. The Result window should come up and it’s value should be 2971

k. Click ‘mid’ button, select ‘probability density’

l. You should have a result table.

m. Click on the graph button. You should have a graph result that looks like the one below.