The Choice stage is indicated in the illustration of the total PISCO process.
The filled-in circle corresponds to the open circle in the Purpose stage. At that stage the exact purpose could be defined.
In the Choice stage the purpose is going to be filled in by a solution.
The lines converging on the filled-in circle are similar to the symbol in the Contract process because the Choice stage is similar to the Contract process.
The Choice stage is involved in narrowing down the alternative solutions generated in the Solutions stage to yield one definite solution.
Which of the alternative solutions is the best?