DS-101 · Module 2

The Metric Stack

3 min read

Every business needs a metric stack: a layered hierarchy of 3 to 5 metrics that tell the complete story of how the business is performing. Not 40 KPIs scattered across 12 dashboards. A single, structured stack with clear relationships between the layers.

  1. North Star Metric One metric that captures the core value your business delivers. For a SaaS company, it might be monthly active users or net revenue retention. For a consulting firm, it might be client outcome achievement rate. This is the single number the CEO checks first. Everything else supports it.
  2. Supporting Metrics (2-3) The metrics that directly drive movement in the North Star. If your North Star is net revenue retention, your supporting metrics might be expansion revenue rate, churn rate, and product adoption score. When the North Star moves, you look here to understand why.
  3. Diagnostic Metrics (3-5) The metrics you check when a supporting metric moves unexpectedly. These are the drill-down layer — feature usage rates, support ticket volume, NPS by segment. You do not review these daily. You pull them when you need to understand a specific movement in the layers above.

The metric stack creates clarity because it creates priority. When everything is a KPI, nothing is. When you have a North Star with two supporting metrics and four diagnostic metrics, every person in the organization knows what matters most, what explains it, and where to dig when something moves. The stack also prevents dashboard bloat — if a metric does not fit into the North Star, supporting, or diagnostic layer, it does not belong on a shared dashboard.