Treat margin protection as a hard constraint on the growth options. Start with the growth objective, then evaluate every lever based on both revenue upside and margin impact.

For example, pricing, mix, customer segments, channels, geography, and capacity expansion can all create growth, but each should be screened against the margin floor.

That prevents you from generating attractive growth ideas that violate the client's stated economics. If useful, this guide on case structure vs. case framework gives more detail.

margin constraint should filter every growth idea imo.

growth at any cost is a different case than growth with margin floor.