Files

tegwick 574bb11db6 feat(example): add supply-chain-vsm composition demo (S3.5)

Demonstrates infospace composition: the Wealth of Nations infospace is
used as a discipline, applying Smith's economic framework as a lens to
analyse modern supply chain management concepts.

New example: examples/supply-chain-vsm/
- infospace.yaml binding WoN as discipline (../infospace-with-history)
- 3 source documents: coordination mechanisms, capital & inventory,
  market structure (~400 words each, original content)
- supply-chain-entity-schema-v1.0.md with WoN Concept required section
- won-mapping-schema-v1.0.md with Conceptual Continuity rating
- artifacts/won-reference/core-entities.md — 12 curated WoN entities
  for injection as discipline context
- 8 hand-crafted entity files demonstrating LLM output format
- 3 mapping files with full rationale and VSM inheritance chains
- Viable: YES (5/5 thresholds)

Key mappings demonstrated:
  Demand Signal          → Effectual Demand        (Strong, S2)
  Vendor-Managed Inventory → Division of Labour    (Strong, S1/S2)
  Just-in-Time Inventory → Circulating Capital     (Strong, S1/S3)
  Bullwhip Effect        → Natural Price           (Moderate, S2)
  Platform Intermediary  → Merchant Capital        (Strong, S2/S4)
  Monopsony Power        → Combination of Masters  (Strong, S3*)

Platform fix: entity_parser.py now recognises ## Supply Chain Domain
as a domain alias for ## Economic Domain, enabling composed infospaces
to use their own domain section name.

Tutorial §13 rewritten with real commands, real output, and the full
mapping table from the demo.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-02-23 00:08:51 +01:00

3.6 KiB

Raw Blame History

Capital and Inventory in Supply Chain Management

Inventory as Frozen Capital

Inventory is working capital immobilised in physical form. Every unit of stock sitting in a warehouse represents capital that has been deployed but not yet returned. The cash-to-cash cycle — the time between paying a supplier and receiving payment from a customer — determines how much working capital a business must hold at any moment. A long cycle requires more capital; a short cycle requires less.

This relationship makes inventory management inseparable from capital management. Decisions about how much stock to hold, where to hold it, and in what form are simultaneously decisions about how to deploy scarce capital. Excess inventory does not merely incur storage costs; it has an opportunity cost equal to the return that capital could earn in its next best use.

Just-in-Time Inventory

Just-in-time (JIT) inventory management is the practice of receiving goods from suppliers only as they are needed in the production process or for customer fulfilment, thereby minimising the volume of inventory held at any moment. JIT was developed in the Japanese automotive industry and achieved its most influential form at Toyota, where it became part of the Toyota Production System.

The goal of JIT is to eliminate inventory as a buffer. Where traditional manufacturing used inventory to absorb variability in supply and demand, JIT addresses variability directly — through reliable supplier relationships, short production runs, and rapid changeover. The capital released from inventory reduction is the primary financial justification for the substantial coordination investments JIT requires.

JIT succeeds when supply chains are stable, geographically concentrated, and have high-quality supplier relationships. It fails when exposed to supply shocks, as the 2011 Tōhoku earthquake and the 2020–2022 global supply chain disruptions demonstrated: the same lean buffers that minimise capital in stable conditions amplify vulnerability in unstable ones.

Safety Stock and Reserve Capacity

Safety stock is inventory held in excess of expected demand to buffer against uncertainty. It is a form of capital deliberately kept unproductive in order to preserve operational continuity. The optimal safety stock level balances the cost of holding excess inventory against the cost of stockouts — lost sales, production stoppages, and damaged customer relationships.

The existence of safety stock reflects a fundamental trade-off in supply chain design: capital efficiency versus operational resilience. A supply chain optimised purely for capital efficiency holds no safety stock, but collapses at the first supply disruption. A supply chain optimised for resilience holds substantial safety stock, but earns a low return on capital employed.

Working Capital Optimisation

Working capital optimisation is the systematic management of the cash-to-cash cycle to reduce the amount of capital tied up in operations at any point. The primary levers are: reducing inventory levels (JIT, VMI), shortening the receivables cycle (faster collection from customers), and lengthening the payables cycle (slower payment to suppliers).

Large buyers — particularly major retailers and platform companies — use their market power to extend payment terms to suppliers to 60, 90, or 120 days while collecting from customers within days. This transfers the financing burden of working capital to the supply chain without reducing the buyer's operational requirements. The result is an effective subsidy from suppliers (often smaller and more capital-constrained) to buyers (typically larger and better-capitalised).

3.6 KiB Raw Blame History Unescape Escape