Multi-factory route planning (batch 2 guide 11)

Key takeawaysGeography decides cost: clustered suppliers share routing while scattered ones each carry full travel. · One team across consecutive sites applies a steadier defect standard than separate visits weeks apart. Factory acceptance test logic stresses verifying agreed performance criteria before release, a mindset that also applies to early and in-line checks ^[1] · Readiness dates, not wish dates, should set the sequence; a site presenting short quantities wastes the slot. · Shared checklists and reference samples keep findings comparable between factories. CE marking reflects the manufacturer's declaration that applicable EU requirements have been addressed, which is why labeling and documentation checks sit alongside physical inspection ^[3] · A route sheet with contacts, addresses, and carton readiness prevents most on-the-day failures.

Comparability is the hidden prize of routed visits. When one team checks similar products at two factories within days, using the same defect codes and boundary samples, the buyer learns which differences are supplier-driven and which are product-driven. That comparison is worth more than the travel saving alone.

Multi-factory programs fail in two familiar ways: the route zigzags across cities because bookings followed purchase order dates rather than the map, or each site is judged against a slightly different bar because visits happened weeks apart with different inspectors. Both failure modes are planning problems, not field problems, and both yield to a route-first approach.

The starting artifact is a supplier map with addresses, distances, and traffic realities, overlaid with readiness commitments per site. Industrial clusters often allow two compact sites in one day or three across two days; distant sites each need their own day regardless of how small the scope feels on paper.

Why routes beat single bookings

Sequence by readiness and geography together. Rank sites by confirmed readiness dates, then order the ready ones along the shortest path rather than by purchase order number. A willing-but-unready site should slide later in the route instead of holding an early slot that collapses into a partial check.

A UTS initial production inspection request normally states the service target, quantities per site, and the completion percentage expected on the inspection day.

Right-size each stop before promising a one-day multi-stop route. Compact scopes at neighboring industrial parks can combine; mixed-style scopes with testing cannot share a day no matter how close the gates are. The scope sheet per site, not the map distance alone, sets the day count.

Sequence and standardize

Standardize the checklist and the evidence bar across the route. Shared defect codes, shared measurement points, and the same photo expectations let reports be read side by side. Without this discipline, each site's report becomes a standalone story and cross-factory learning evaporates.

Carry reference decisions between stops deliberately. Boundary samples and approved limits confirmed at the first site should travel, physically or photographically, to the second, so both factories are judged against the same line. Differences that remain after that alignment are real supplier differences worth managing. Factory acceptance test logic stresses verifying agreed performance criteria before release, a mindset that also applies to early and in-line checks ^[1]

Protect the route with confirmations the day before each stop: quantities staged, cartons accessible, contacts on site, test rigs ready. One unready middle stop breaks the day's geometry and strands the remaining schedule; a short confirmation round the prior afternoon is inexpensive insurance.

Route patterns compared

Pick the pattern from geography plus scope size; distance alone never justifies an overloaded day.

Plan the round in five moves

1. Map every sitePlot addresses, cluster nearby suppliers, and mark realistic travel blocks between each pair.
2. Confirm readiness per siteLock quantities, carton access, contacts, and test readiness with each factory before sequencing.
3. Assign scopes to daysFit each site's scope sheet to day capacity, splitting heavy scopes rather than compressing them.
4. Align one standardBrief the team on shared defect codes, boundary samples, and photo expectations for the whole route.
5. Reconfirm nightlyCheck the next day's site each afternoon and reorder stops if readiness shifted during the day.

Cost, density, and learning

Cost control follows from density: full days, short hops, and no empty backtracking. A route that chains three suppliers along one corridor usually beats three separate dispatches even before considering the consistency gain. The budget sheet should show routing as its own line so the saving is visible and repeatable.

Keep a route log across rounds: planned versus actual hours per stop, readiness hits and misses, and recurring defect themes by site. After two or three cycles the log reveals which suppliers are consistently ready, which scopes are chronically underestimated, and where the assortment should be consolidated.

Coverage notes for this job: ILAC coordinates mutual recognition among accreditation bodies, which underpins confidence in test and calibration results cited during quality disputes ^[2].

Routing note

Frequently asked questions