How the index is built.

Each layer is scored from 0 to 10, from the answers to the diagnostic. The five layer scores are combined into one ESRE OS Performance Score from 0 to 100, using these weights:

OS Performance Score = (L1×1.0 + L2×1.4 + L3×1.0 + L4×1.0 + L5×0.6) ÷ 5 × 10

The Operating Model (L2) carries the highest weight because the other layers depend on it: technology automates it, data records it and governance controls it. Governance (L5) carries the lowest, because controls cannot make up for weak layers underneath them.

In Crelligent's diagnostic work, L2 is the layer that most often holds enterprises back. That is a hypothesis. The inaugural edition will test it, and the weights will be reviewed against the data.

Score bands (for example healthy, at risk, critical) are not fixed in advance. They will be set from the data once the inaugural sample is complete, and published with the edition.

Primary constraint

For each enterprise, the primary constraint is the layer that most limits its performance. Where L2 scores below 6 out of 10, it is flagged as the primary constraint.

The index covers Nigerian mid-market enterprises. For the inaugural edition, that means private enterprises operating in Nigeria with:

• 20 or more full-time staff, and
• annual revenue above ₦500,000,000.

Any enterprise can take the diagnostic and receive its own score. Enterprises outside this range are not included in the mid-market results; each edition states how many responses were excluded and why.

The diagnostic is designed to be completed by a CEO, founder or senior executive who can answer for the whole business.

Data comes from two sources:

1. 1.The ESRE OS diagnostic at crelligent.com/diagnostic (opens crelligent.com), completed by senior leaders of participating enterprises.
2. 2.Anonymised results from Crelligent client diagnostics, where the client has agreed to be included.

Participation is voluntary, so the sample is self-selected rather than random. Each edition reports the final sample size and its make-up (by sector, size and location), so readers can judge how far the results can be generalised.

• Company names, people’s names and contact details are removed before any analysis for publication.
• Results are published only as aggregates: for example by sector, revenue band or location.
• No published group contains fewer than 10 enterprises. Where a group is smaller, it is merged into a broader one.
• Individual answers and scores are never published, and never shared with other participants, partners or investors.

• The sample size and how it breaks down by sector, size and location.
• Median and spread of the ESRE OS Performance Score, and of each layer score.
• How often each layer is the primary constraint.
• Breakdowns by sector, revenue band and location, wherever each group has at least 10 enterprises.
• The method, its limitations, and any changes since the last edition.

Editions are published quarterly. The inaugural edition covers Q4 2026.

• The diagnostic is self-reported. Leaders may see their business more or less favourably than an outside reviewer would.
• The sample is self-selected. Results describe the enterprises that took part, not every Nigerian enterprise.
• Small groups are merged or not reported, so some sectors may not appear separately in early editions.
• The weights reflect Crelligent’s model of how enterprises work. The inaugural data will be used to test them.