Upstream of the Stockout: A vendor dependency scan, lead-time buffer tracking, and a supplier health poll: the weekly layer that catches concentration risk before the shelf empties.

A six-question diagnostic intake routes the reader to the right starting tool based on which leg of the supply chain is under-monitored right now.

The three instruments, in order most operators run them after the diagnostic:

Vendor Dependency Quadrant Scan is twenty minutes a week mapping every active vendor against a four-quadrant framework — criticality on one axis, switching cost on the other. The quadrant that matters is Quadrant A: high criticality, high switching cost. Every Quadrant A entry that does not have a documented contingency plan is an undisclosed liability. Two worked examples: a manufacturing workshop running a focused single-line scan that finds two Quadrant A entries with no backup qualified, and a Yogyakarta multi-channel ceramics exporter at IDR 3.2 billion revenue surfacing seven Quadrant A flags on the first run.

Lead-Time Buffer Tracker is a weekly check on actual delivered lead time against contracted lead time, flagging drift before the buffer is gone. Lead time drift is quiet — it moves one to two days per delivery, which looks like noise until the cumulative drift erases the safety stock calculation. Two worked examples: a garment workshop tracking domestic fabric vendors where the drift is slow and steady, and a Tangerang B2B specialty-ink converter at IDR 8.4 billion catching a delayed factory notification three months early through a split-order test that the tracker prompted.

Supplier Health Poll is five minutes per week scanning the relational signals that pre-date supplier financial trouble: response speed, communication tone, payment posture toward the operator, and public news. The poll does not replace a credit check; it catches the behavioral changes that precede the credit event. Two worked examples: a domestic food processor monitoring local supplier health where the signals are informal and readable, and a Bekasi cross-border consumer goods distributor at IDR 22 billion catching a behavioral communication change in a cross-border supplier as a pre-disruption signal that the formal reporting channels did not surface.

Each tool carries a self-scoring rubric, a quick decision tree, and tier adaptations for single-owner shops, mid-tier businesses, and pre-IPO operations. A thirty-day plan at the back sequences the three tools so the rhythm forms without overload.

Written from the seat of an Indonesian operator. Supply chain concentration is a global SME problem with a consistent weekly-discipline solution.

What this companion does NOT do

Replace Supply Chain Risk Mitigation (Operator Playbooks 09).

Address quarterly supply chain recalibration or scenario-triggered crises.

Who This Is For

Operators with three or more critical vendors and no formal SRM function.

Owners whose supply chain has grown more concentrated without explicit decision.

Mid-tier directors who want a structured weekly rhythm before the next disruption lands.

Topics and Keywords

weekly supply chain risk, vendor dependency scan, lead time buffer, supplier health, single source detection, SME supply chain, operator playbook companion