What is Parliamentarism?

The parliamentary system consists of the shared power between the Executive and the Legislative, in this type of government sovereignty rests with the congress.

There are 3 types of parliamentary systems:

First above its uneven. (English prototype).
First between unequal. (German prototype).
First among equals.

The vast majority of European countries have their governments established under the parliamentary system, the English system being the prototype par excellence.
The weakness of the parliamentary system is that it needs a bit of indiscipline, that is, that the Members should separate themselves a bit from the party lines and thus achieve more flexibility in the congress

The Parliamentary System with prime minister or cabinet is the most common and consists of a single party government, elections are pluralistic and parliament has a system bipartisan, that is, one party is the one that remains in charge of the government while the other acts as the opposition, being of the utmost importance that the party ideology is strong. The 2 models of this parliamentary system are those represented by the English and German governments:

The English system is that the winning party gets everything.
The main characteristic of the German system is that it is tripartite with a mixed electoral system (majority average), there is no parties opposed to the system, it is the congress that appoints the Chancellor but NOT the cabinet, which brings with it a constant government of coalition.

The Government by assembly has as its prototype the 3rd French Republic and consists of: The cabinet does not direct the legislature, power is not unified, that is, there is no partisan discipline and coalitions are not always the solution.