The principle of individual ministerial responsibility refers to the convention that a minister is responsible to every actions of their department / ministry and it's applicable in the presidential system of government. Collective responsibility is to cabinet or parliamentary system of government where ministers are collectively responsible for there decisions.

Differences Between Political Parties and Pressure Groups Pressure Groups and Political Parties (Our Views) The central objective of a pressure group is to influence government policies in favour of its members. To achieve this objective, a pressure group sometimes presents written proposals to government officials. But in presenting its proposals, a pressure group often rationalizes its own interests...