Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR SCOPE. YOUR SAMPLE. YOUR SUPPLIER RECORD.
Supplier Evaluation Review the Evidence Behind Your Custom-Part Quote
Use this machine shop supplier evaluation checklist to compare manufacturing scope, controlled requirements, sample evidence and order responsibilities. Record what has been reviewed before approving your supplier.
Illustrative component concepts. Your supplier documents and approval govern your order.
01
Supplier & scope
Identify the entity and included operations.
02
Controlled requirements
Connect the drawing, material and finish.
03
Sample & records
Agree what evidence your team reviews.
04
Changes & supply
Define responsibilities for repeat orders.
START WITH YOUR SUPPLIER REVIEW
CNC Supplier Qualification Questions for Your Actual Scope
Who supplies the order?
Confirm the legal entity, manufacturing location, quotation scope and the contact responsible for the project.
Which operations are included?
Review machining, finishing, joining and outside work. Ask how requirements and records pass between operations.
What evidence is available?
Review the current certificate scope where relevant, inspection plan, sample requirements and document availability. A certificate does not accept your individual parts.
4 Controls to Connect Your Requirements
Drawing & revision
Use one approved baseline for your review.
Material & outside work
Identify grade, condition and processing evidence.
Sample & release
Name acceptance checks and approval authority.
Changes & exceptions
Obtain the required authorization before release.
Your Supplier Quote Comparison Checklist
Compare proposals against the same controlled scope. A lower total means little if the quotations cover different requirements.
| Review topic | Scope to compare | Your decision |
|---|---|---|
| Drawing baseline | Same revision, units, critical dimensions and agreed acceptance. | Confirm the same baseline or record the exception. |
| Material & finish | Same grade, condition, product form, treatment and masking scope. | Confirm the same baseline or record the exception. |
| Quantity & tooling | Separate sample, repeat quantity, tooling and any one-time scope. | Confirm the same baseline or record the exception. |
| Checks & delivery | Compare inspection records, packing, delivery assumptions and exclusions. | Confirm the same baseline or record the exception. |
FROM SUPPLIER REVIEW TO YOUR ORDER
Connect the Supplier Record to Your Acceptance Plan
Review the named organization, the work included in its quote and the evidence required for your part.
Explore company quality planning →These are illustrative component concepts, not competing supplier offers, case studies or price evidence.
Evidence for Your Purchasing & Quality Teams
Keep Reviewed Evidence Separate from Promises
Use the checklist to identify unanswered questions. Keep the supplier documents and your approval decision in your own controlled purchasing record.
Define What Your Sample Must Demonstrate
Manufacturing supplier sample evaluation should connect the approved revision to specific checks. Appearance alone does not establish dimensional compliance or application performance.
Feature evidence
Review the critical dimensions, interfaces and inspection condition against the controlled drawing.
Material & process evidence
Agree the records that identify grade, condition, lot reference and required processing.
Approval responsibility
State who accepts each result and which application-level validation remains separate.
The concept caliper is closed and shows0.00mm as an illustrative zero check. It does not measure either pictured part.
Review company quality planning →
4 Responsibilities to Agree for Repeat Supply
Changes
Define how revised drawings, materials and exceptions are approved.
Records
Define which inspection and material records accompany the supplied batch.
Handling
Agree protection, cleaning, packing and identification requirements.
Issue follow-up
Identify contacts and the process for reporting, reviewing and closing an issue.
6 Inputs for a Useful Supplier Discussion
- Controlled drawing, CAD and intended function.
- Material, finish and critical requirements.
- Sample quantity and repeat-demand assumptions.
- Required certificates, inspection records and traceability.
- Packing, identification and delivery needs.
- Approval contacts and the change-control process.
When a Supplier Issue Needs Attention
Agree contacts, affected quantities and approval responsibility for your order.
01 · Identify & contain
Identify the affected order, revision and parts.
02 · Agree disposition
Confirm authorized rework, replacement or other action.
03 · Review the cause
Agree investigation and corrective actions.
04 · Verify & close
Confirm the agreed evidence and retain your records.
Rework or a concession still needs the required authorization.
YOUR APPROVAL BASELINE
Keep the Decision with Your Evidence
Use the review inputs and checklist above to identify unanswered questions. Your organization decides whether the supplier and sample meet your requirements.
Prepare DFM questions → · Review material identity → · Prepare the quote baseline →
Answers Before You Approve a Supplier
How to evaluate a custom parts supplier before ordering?
Compare scope, controlled requirements, sample evidence, documentation and change responsibilities. Record unanswered questions and obtain your required internal approval.
Does completing this checklist qualify a supplier?
No. It counts selected review checks only. Your organization decides qualification based on its requirements and evidence.
Does a system certificate replace sample acceptance?
No. Review the current entity, site and certificate scope separately from the acceptance requirements for your parts.
Can I compare quotations with different drawing revisions?
Resolve the baseline first. Changes to geometry, material, quantity, finish or inspection can make the proposals cover different work.
