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Layer 1: Foundation (the Four Fits)

See the system index for how this layer fits the whole system.

Purpose

Establish why the business grows and through which channels it can. This is the strategic bedrock that the investor-facing and Paul-facing documents rest on. It answers, before any tactics, whether our product, market, channels, and money model actually line up.

Research lineage

Brian Balfour, Four Fits for $100M+ Growth. The core claim is that product-market fit alone does not produce scale. Four fits must hold together: Market-Product, Product-Channel, Channel-Model, and Model-Market. Two principles drive our decisions: products are built to fit the channels that reach customers (channels do not bend to products), and the business model carries equal weight with the product on an acquisition-cost-versus-revenue axis.

The four fits in brief

  • Market-Product fit. The product solves a real, understood need for a defined market.
  • Product-Channel fit. The product is shaped to suit the channels that actually reach customers, because channels do not bend to the product.
  • Channel-Model fit. The economics of the channel line up with the revenue model, weighed on an acquisition-cost versus revenue-per-customer axis.
  • Model-Market fit. The way we price and charge, and the size and buying behavior of the market, support the business.

What plugs in here

  • Brand and voice: brand.md (this layer) is the working source of truth for voice; the mg-voice skill points to it and conforms to it. All customer-facing copy must conform.
  • Market-Product fit: icp.md, positioning.md.
  • Channel-Model fit: the LTV-around-$16,000 finding, Portland-measured and not yet trusted in new markets (reference-ltv-portland-16000 memory), and ../2-growth-model/goals-and-kpis.md.
  • Model-Market fit: business model and real-estate context in docs/general/.

The fits, applied to us

Each fit, stated as it actually applies to Metrognome. The two that settle live debates (Product-Channel and Channel-Model) are stated as committed positions, not open questions.

  • Market-Product. A real, private, gear-equipped room that is yours on your schedule, for working musicians whose current space (apartment, garage, storage unit, basement) fails them. Detail in icp.md and positioning.md.
  • Product-Channel (committed). A monthly lockout is a toured, high-consideration purchase, and that rules channels in or out. High-intent capture, above all search, fits it: it reaches people at the moment they are looking for exactly this. Cold interruption (broad social to people who aren't looking) does not, no matter how cheap the clicks. This is the authority behind the committed lane in Layer 3 (channels.md). The Salem evidence bears it out: February's high-intent search spend produced the only real organic move-in batch we have, and when search was cut while low-intent Meta traffic spend quadrupled, move-ins went to zero.
  • Channel-Model (committed). With member LTV around $16,000 (Portland-measured; not yet trusted in new markets), acquisition-cost tolerance is high and payback can be long without being a problem. Paid is therefore structurally viable, and the binding constraint is visit volume and measurement, not cost per acquisition. We do not optimize for cheap clicks; we optimize for qualified visits and move-ins.
  • Model-Market. Pricing and market size support the model; context in docs/general/. Note the open caveat that Salem is a smaller (C-tier) market and its LTV is not yet measured.

Gaps and next steps

  • Done (2026-06-23): the four fits are now stated as a set above, with Product-Channel and Channel-Model committed; Product-Channel is the authority behind channels.md.
  • Brand and voice is Partial: the "scene elder" voice is a working bet pending a focused work session (see brand.md).
  • Reconciled (2026-06-23): ../2-growth-model/goals-and-kpis.md now carries ~$16,000 (Portland-measured), flagged as not yet trusted in new markets.