stack an analysis

Of course, all these people might have ended up doing some of these things anyway ― but by planning these treats as rewards for efforts expended, they were helping to stack the cost-benefit analysis in the direction of overcoming procrastination.


What does the bold part mean?
Can someone replace the word "stack" with some easier word?

How to Have a Good Day

To stack (Usually as in "I lost $10,000 playing poker - the cards were stacked.") -> To arrange something [beforehand] with the intention of influencing the result [often '+ against someone/something']; to bias,

PaulQ said:

To stack (Usually as in "I lost $10,000 playing poker - the cards were stacked.") -> To arrange something [beforehand] with the intention of influencing the result [often '+ against someone/something']; to bias,

Thank you!!