The substrate the SRD diagnostic rests on.

A measurable construct for organisational response delay.

Signal-Response Distance is a measurable construct for the elapsed time between the moment a strategically-relevant signal becomes available in an organisation's environment and the moment the organisation's response is committed and observable. The construct is operational, not conceptual: the strategy literature has named the importance of organisational responsiveness across forty years (Stalk; Boyd; Haeckel; Teece; Eisenhardt; Cohen & Levinthal; Snowden — see SRD paper §3) but the temporal gap that responsiveness depends on has been consistently named without being instrumented.

SRD provides the measurement instrument: decomposed across three primary intervals (detection, interpretation, implementation), placed against signal complexity in a four-quadrant diagnostic matrix, and anchored in the six-stock capability stack derived from dynamic-capabilities and absorptive-capacity literatures. Full construct specification: Olivier 2026 (Working Paper v0.3).

Six places. Six delays.

The response moves through six capability stocks before it actually lands. Each has its own delay. The total response distance is the sum.

1. Sensing (Teece 2007)

   Recognising the signal arrived.

2. Acquisition (Cohen & Levinthal 1990 — potential absorptive capacity)

   Taking in the information that changes the picture.

3. Assimilation (Cohen & Levinthal 1990 — realised absorptive capacity)

   Turning information into something actionable. Most "stuck transformations" have an Assimilation problem disguised as something else.

4. Seizing (Teece 2007)

   Committing resource and authority.

5. Reconfiguring (Teece 2007)

   Changing structure and process to respond. Longest-cycle stock.

6. Reflexive (Argyris 1976 — double-loop learning)

   Learning whether the response worked.

Executives usually assume the bottleneck is Seizing. More often it's Assimilation or Reflexive. The diagnostic forces measurement before assumption.

Full stack treatment →

Quadrant placement is the diagnostic's compressed output.

Each measured signal is classified by response distance × signal complexity into one of four quadrants. Each quadrant has a distinct intervention prescription. Misplacement is the most expensive error the diagnostic produces; placement-protocol discipline (Part C) is what guards against it.

• Q1 · Well-Instrumented — short SRD, low complexity. Signals are clear, response pathways are fast.

• Q2 · Augmented Frontier — short SRD, high complexity. The strategic prize. Where AI investment lands hardest.

• Q3 · Instrumentation Gap — long SRD, low complexity. Simple signal, slow organisation. Cheaper to fix than expected.

• Q4 · Slow-Complex Zone — long SRD, high complexity. Where most strategic failure lives. Pathology-or-posture distinction matters.

Full matrix treatment →

PSI · ALPHA · TAO · OMEGA.

The Playbook grounds the SRD diagnostic protocol in the EE theory set specified by Dietz & Mulder (D&M 2024, §4.4) — eleven interlocking theories of which four are load-bearing for SRD application. No theory in §A.4 is original to the Playbook; the Soaring Wings contribution is the engagement protocol that uses these theories as analytical machinery.

PSI Theory (D&M 2024, §4.4.4 + §7) — Performing in Social Interaction. Frames organisational coordination as transaction patterns between actors. Used in SRD diagnosis to decompose response-chain failures into coordination primitives: a missing promise, a request without acceptance, a broken execution chain.

ALPHA Theory (D&M 2024, §4.4.7 + §8) — the organisational essence theory. Provides the four-layer abstraction (O-Original, I-Informational, D-Documental, M-Material) that anchors where each SRD chain point operates: the I-Layer is where t₀→t₁ (detection) and t₁→t₂ (interpretation) live; D and M carry implementation latency.

TAO Theory (D&M 2024, §4.4.3 + §5) — the function-construction theory. Separates business function (affordances) from construction. Used inside SRD diagnostics to identify where organisations have over-coupled response function to legacy construction, producing structural delay.

OMEGA Theory (D&M 2024, §4.4.6 + §7) — modular coordination-structure theory. Applied when an SRD diagnostic identifies that the binding constraint requires structural redesign rather than incremental compression.

DEMO Methodology (D&M 2024, §11) — the methodological packaging that operationalises the EE theory set. The EssentialModelKit corpus (§A.5) is its operational implementation.

The frameworks are sophisticated; the deliverable is restrained. EE theory runs in the background. The diagnostic conclusion is what reaches the executive.

EssentialModelKit — the EE theory set as working software.

The Essential Model that the Soaring Wings reference platforms load at launch is the operational implementation of §A.4 inside working software. Following DEMO and the Organisational Essence Revealing (OER) method (D&M 2024, §11), the methodology repository holds 155 concepts across the PSI / ALPHA / TAO / OMEGA partitions, 44 relationships, 12 competency questions, 5 JSON schemas, and a 66-fixture action-rule corpus. The shared EssentialModelKit Swift package loads this corpus at launch in both reference platforms.

The Soaring Wings contribution at §A.5 is the engineering implementation — the schema design, the rule corpus, the coordination-fact ledger with hash-chain integrity verification — applied to the Dietz & Mulder theory set. The theory itself is cited, not claimed.

EssentialModel/ directory of the methodology repo