The Warrior principle for defining a future frigate

What should be included in the decision process for a future frigate?

Drachinifel's Warrior principle is to define the capability, verify the required systems, and then design a hull to contain them before building.

Drachinifel calls his preferred design sequence the Warrior principle. First comes an explicit capability, followed by checking that the systems needed to deliver it exist and work. The hull can then be designed to contain those systems with the cost of the requirement acknowledged. His criticism of Constellation, LCS, Zumwalt, and to a qualified extent Type 45 concerns beginning work before those choices are settled. A carpentry analogy illustrates the sequence: deciding what to build precedes cutting and assembling the timber.