How do you make cplex use a greedy optimization solution as opposed to the optimal solution? Are there parameters you can set or is this not possible?
What you can do is to compute the greedy solution yourself and then submit this as a warmstart/MIP start.
There are no parameters to force CPLEX to use a greedy algorithm to construct a solution since it is not clear how weights for a greedy algorithm should be chosen for an arbitrary MIP. So for a general MIP, it is not clear what a greedy algorithm should do exactly and whether it would have a chance to succeed or not.
If a model is suitable for a greedy approach then it frequently is easy to implement the greedy approach in an external tool and just warm start CPLEX with that solution.