You can't have first-past-the-post in a parliamentary system. But yeah, that's the one dependency they have, otherwise, those are independent. You can even have

You can't have first-past-the-post in a parliamentary system. But yeah, that's the one dependency they have, otherwise, those are independent. You can even have weird districtal systems that look parliamentary and use first-past-the-post. Either way, majoritarian elections are a plague and must be avoided as much as possible.