Question

1.A pharmaceutical company makes sales calls to physicians to market their drugs. They want to determine the impact of sales calls on the profit it achieves per physician. The profit per physician depends on the number of new prescriptions that are written and the cost of making the sales calls. The cost of making the sales calls depends on the number of sales calls made. The number of sales calls also impacts the number of new prescriptions written. Construct an influence diagram that relates these variables.

Answer 1

Influence diagram for profit per physician :

Note :
1) Double oval is a deterministic node
2) A hexagon(or you can choose diamond or octagon) is a value node
3) A rectangle is a decision node
4) A rectangle tapered around the edge(make one sales call) is a function node as the cost of a unit sales call depends on making a call.
5) An arrow from node A to node B means knowing A directly affects B