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Guide

Lead time: the real phases and how to plan production timelines

A practical breakdown of lead time in jewellery manufacturing: from brief to series, what speeds it up, what slows it down, and how to plan launches without last-minute surprises.

D'Or Joiers

What “lead time” means in B2B jewellery

Lead time is the total time from order validation to ready-to-deliver product (including checks and finishing). In jewellery, it isn’t a single phase: it’s a chain.

Typical phases (end to end)

1) Initial alignment (brief + feasibility)

  • Specification validation
  • Confirmation of materials, finishes, stones, packaging
  • Review of tolerances and risks

What delays it: incomplete brief, scope changes, undecided materials/finishes.

2) CAD / engineering (if applicable)

  • Design-for-manufacture adjustments (DFM)
  • Defining tolerances and critical areas
  • Preparing for prototype

What delays it: missing key dimensions, repeated changes, undocumented requirements.

3) Prototyping / sample (if applicable)

  • Prototype to validate aesthetics, comfort, strength, setting
  • Adjustments after feedback

What delays it: endless revisions without clear acceptance criteria.

4) Industrial preparation (tooling / jigs / moulds)

  • Setup for consistent production
  • Process definition and control points

What delays it: high complexity, high variability, extreme tolerances.

5) Production

  • Batch manufacturing according to process (casting, stamping, assembly)
  • Consistency monitoring

What delays it: last-minute changes, material variation, supply issues.

6) Finishing and treatments

  • Polishing, textures, plating, contrasts, engraving, etc.

What delays it: multiple finishes in one reference, finish changes after validation.

7) Quality control (QC)

  • Dimensional/aesthetic inspection
  • Setting security and functionality checks
  • Rejections/rework management

What delays it: undefined criteria, no approved “golden sample”, unagreed tolerances.

8) Packaging and shipment preparation

  • Labelling, sets, final packing
  • Documentation and dispatch (if applicable)

What accelerates lead time (without lowering quality)

  • A closed, approved brief (material, finish, stones, packaging).
  • An approved golden sample.
  • QC criteria aligned with the brand.
  • Grouping compatible references in the same production window.
  • Controlled change management: one channel, one owner, a cadence.

What typically breaks the schedule

  • Design changes after prototyping without assessing tooling impact.
  • Too many variants (sizes, colours, stones) from the first lot.
  • Unclear priorities: cost vs speed vs absolute aesthetic perfection.
  • Missing approvals at key milestones.
  1. Define your target delivery date.
  2. Lock a window for prototype + approval.
  3. Add buffer for QC and rework.
  4. Prioritise: start with 1-2 “hero” references before scaling to 10.

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