Dependency Concentration

Almost every other concept System Drift studies — reversibility, governance surface, operational capture, exit complexity — assumes a prior step: that an organization has settled, in practice, around a small number of platforms. Concentration is that prior step. It is the ground the rest of the library stands on.

Organizations rarely choose to concentrate. They make ten reasonable decisions years apart and find, later, that the ten decisions point to three vendors. The framework is concerned less with the choices themselves than with the cumulative shape they form, and with how clearly that shape is seen from inside.

Concentration is not, in itself, a failure. It is often the by-product of efficiency. But concentration changes the meaning of every subsequent vendor decision: it narrows the field of what is reversible, and it lengthens the consequences of every outage, repricing, and roadmap shift.

“Concentration is what every other dependency framework is measuring against.”

Concentration is frequently confused with adjacent ideas. The distinctions are worth drawing carefully, because each describes something different about the relationship between an organization and its suppliers.

• Concentrationvs.Scale
  A vendor can be large in the market without being concentrated inside any one organization. Scale describes the vendor; concentration describes the buyer's posture toward it.
• Concentrationvs.Standardization
  Standardizing on one tool is a deliberate choice. Concentration is the cumulative result of many such choices, often made independently, that compound over time.
• Concentrationvs.Lock-in
  Lock-in describes the difficulty of leaving. Concentration describes how much of the operation is exposed. The two are related, but they are not the same measurement.

Dependency Concentration is the first lens System Drift applies to any subject of research. It precedes — and informs — every other framework in the library.

• ResearchLong-form publications begin by establishing the concentration profile of a category before examining its behavior over time.
• ProfilesDependency Profiles describe the surface a single vendor occupies inside the wider concentration picture.
• ObservatoryConcentration indices track the share of operational surface held by the largest providers in each category.

The framework is intentionally diagnostic rather than prescriptive. It does not argue that concentration is wrong. It argues that concentration is a fact worth naming, before any further analysis can stand on it.