Close the prototype feedback loop
Collect feedback from engineering, assembly and the intended installer. Separate essential corrections from optional improvements, then update the design package. Do not rely on handwritten notes on a sample as the only production instruction. Each accepted change should appear in the controlled drawing, model or specification.
- Record assembly issues, fit changes and access problems.
- Update part numbers, revisions and the bill of materials.
- Identify the approved sample and its relationship to the drawings.
- Resolve drawing conflicts before releasing the order.
Agree the production scope
A prototype may include manual adjustments that are not suitable for a repeat batch. Ask the fabricator to review the production approach and any setup or tooling requirements. Confirm whether the order includes hardware, welding, finishing, assembly, inspection and transport. Revisit the quotation if the revision or scope changes after pricing.
- Order quantity and expected batch sizes.
- Approved material and finish specifications.
- Customer-supplied components and delivery responsibilities.
- Setup, tooling and recurring charges stated separately where applicable.
Define acceptance before manufacturing
Make the inspection plan proportional to the function of the part. Identify critical interfaces and agree how they will be checked. Decide what records need to accompany the batch and who approves the first production pieces. A good plan defines acceptance clearly without treating every cosmetic or non-critical dimension as equally important.
- Critical dimensions, mating interfaces and functional checks.
- Agreed sample or first-piece approval process.
- Appearance reference and acceptable finish variations.
- Required inspection records, material documents and part identification.
Protect the parts after fabrication
Packing and handling can affect delivered quality even when a part leaves the factory in good condition. Explain how parts will be stored, transported and unpacked. Identify visible faces that need protection and whether assemblies should ship together or in separate packs. Agree labels that connect the shipment to your purchase order and drawing revision.
- Protection for finished faces and vulnerable corners.
- Part number, revision and quantity on labels.
- Assembly grouping and hardware packing instructions.
- Delivery address, unloading constraints and contact arrangements.
Make repeat orders easy to reproduce
Retain the approved drawing package, quotation clarifications and acceptance record together. Quote the same part number and revision on repeat orders. When changing the design, identify the affected parts and ask for confirmation of cost and lead-time impact. Shabari handles single prototypes and repeat fabrication batches; send the current package for a scope review rather than assuming an earlier price covers a changed design.