A procedural function chart (PFC) is a graphical representation of the recipe's logic. You construct the PFC using steps, transitions, and a termination from the Recipe Studio palette. As soon as a transition is true, the previous step is stopped if it is not already complete. Typically a transition condition is a pause to wait until the preceding step completes. However, it is also valid to create a transition such as LEVEL > 50 to stop a FILL step when the tank level is greater than 50.