What happens to the business if one channel closes?
Channel Resilience is the fifth foundation. It asks whether the business’s reach is robust or fragile: whether one marketplace, one acquisition channel or one algorithm change could break it. The failure cluster is Channel Dependency, and it is usually invisible until the day the channel changes its terms.
The four checks
Is any single marketplace able to break the business?
Are marketplace economics understood on their own terms?
Is retention infrastructure built alongside acquisition?
The self-assessment runs all thirty-six checks in thirty honest minutes and nothing you enter leaves your browser. The Barking Cat Review applies them to your business by walking it as a customer does, measuring what it finds against your numbers, and naming the constraint that is actually binding.