The criteria and constraints used in such design vary depending on the optimization methods used.[1] Usually democratic political systems have not been deemed suitable as subjects of political engineering methods.[4][5] Political engineering, using suboptimal methods or criteria, can sometimes yield disastrous results as in the case of attempting to engineer a previously democratic country's political landscape by such methods as, for example, a coup d'état. The Greek military junta of 1967–74 used political engineering utilizing a coup d'état to dissolve the democratic system of Greece with catastrophic results. Political engineering can also be employed to design alternative voting procedures in a democratic system.[6]