Textual Commitment - Article I - Legislative Power, Article II - Executive Power, Article III - Judicial Power. If the issue at hand falls specifically within Article I, II, or III, the Constitution commits the matter to that particular branch of Gov.
Justiciable Discoverable & Manageable Standard in the Constitution - this is self explanatory. Has the court ruled on such an issue before, or has the court developed a test for resolving such an issue.
Prudential Strand - Basically, does this issue, in some way, implicate the separation of powers. If so, it’s a political question.