This checklist helps buyers identify molder risk and review contingency plans. It covers supplier risk controls, molder evaluation evidence, communication, and response to disruptions, with red flags to check before awarding a project.
- Check that the molder has written contingency plans for tooling, materials, labor, and quality failures
- Verify supplier risk controls with evidence such as audit results, PPAP status, and second-source agreements
- Test molder evaluation by asking how they handle nonconforming parts, tool wear, and schedule delays
- Confirm communication and escalation paths in writing before the first production run
- Require a joint review of risks specific to your part design, material, and volume
Why molder risk checks fail
Most buyers check molder risk only at the start of a project. They review the quote, the lead time, and the price. Then the first mold trial reveals a defect, a late shipment, or a material shortage. The molder is responsive but unprepared. The buyer is left chasing answers while production stalls.
A better approach is to treat molder risk as a standing review. Before awarding work, check the molder’s ability to plan for failure. After the first production run, review what actually happened. If the molder cannot show how it handles disruptions, do not assume it will.
This checklist is not a single audit. It is a working list. Use it to prepare questions, review documents, and score responses. It covers five areas: tooling, materials, labor, quality, and communication. Each section includes a short explanation and red flags.
Check tooling and mold ownership
The first question is who owns the mold. If the molder owns it, confirm transfer conditions. If the buyer owns it, confirm storage, maintenance, and access rights.
The mold is the single point of failure for most projects. A cracked core, a worn gate, or a corroded surface can stop production for days. The molder should have a written plan for mold maintenance, repair, and relocation.
Ask for the mold certificate, the last inspection report, and the maintenance schedule. If the mold is older than a few years, ask for a recent CMM report on critical features. Ask how the molder handles mold failure during production. Does it have a backup tooling partner? Does it have a repair plan?
Red flags:
- The molder owns the mold but refuses to state transfer conditions
- No maintenance schedule exists, or the last inspection was more than a year ago
- The molder says it will handle mold repairs “as needed” without a named vendor
- The mold is stored in an uncontrolled environment with no documentation
A molder that cannot explain its mold plan is a molder that has not planned.
Check material supply and sourcing
Material risk is often underweighted. A resin shortage, a contaminated lot, or a wrong grade can stop a line. The molder should have a written material control plan.
Ask for the supplier approval list, the incoming inspection procedure, and the lot traceability method. Ask how the molder handles material substitution. If the specified resin is unavailable, who approves the change? The buyer, the molder, or both?
For critical parts, ask if the molder has a second source for the material. If not, ask how it sources replacement material in a shortage. Ask for the certificate of analysis for each lot. Ask how the molder handles expired or out-of-spec material.
Red flags:
- The molder uses multiple suppliers for the same resin without buyer approval
- No lot traceability is available after the part is shipped
- Material substitutions are made without written buyer confirmation
- The molder cannot provide the certificate of analysis for the current lot
Material risk is not just a price issue. It is a quality and schedule issue. A molder that cannot trace material to the part is a molder that cannot defend a defect claim.
Check labor and capacity
Labor risk is often invisible. A key operator retires. A shift supervisor quits. A machine goes down for unplanned maintenance. The molder should have a plan for all three.
Ask about the skill levels of the operators. Ask how long the lead operator has been on the line. Ask if there are backup operators trained on the specific tool. Ask about shift coverage. If the molder runs a single shift, ask what happens when that shift is short-staffed.
For capacity, ask for a current utilization report. If the molder is running above 90 percent, ask how it handles new work. Does it have a second machine? Does it have a partner molder? Ask for a written plan for capacity shortfalls.
Red flags:
- The lead operator is the only person trained on the tool
- The molder has no written plan for operator absence
- Capacity is at or above 95 percent with no overflow plan
- The molder says it will “manage” capacity without a specific plan
A molder that relies on one person for a critical tool is a molder that has not planned for failure.
Check quality and nonconformance handling
Quality risk is the most visible form of molder risk. A nonconforming lot can stop a customer line, generate rework, or require recall. The molder should have a written nonconformance process.
Ask for the quality plan. Ask for the control plan. Ask for the last PPAP or equivalent submission. Ask how the molder handles a customer complaint. Ask how it isolates suspect material. Ask how it communicates a defect to the buyer.
For a new part, ask for a first article inspection report. For an existing part, ask for the last three months of quality data. Ask for the defect rate, the scrap rate, and the rework rate. Ask how the molder tracks corrective actions.
Red flags:
- No written quality plan or control plan is available
- The molder cannot provide the last PPAP or equivalent document
- Defect data is not tracked or is only available on request
- Corrective actions are not closed within a defined time frame
- The molder blames material or tooling without a root cause analysis
A molder that cannot show quality data is a molder that has not measured its performance.
Check communication and escalation
Communication risk is the most common form of molder risk. A delay is discovered too late. A quality issue is not reported. A material change is not communicated. The buyer finds out from a customer complaint.
Ask for the communication plan. Ask who the single point of contact is. Ask how often status updates are provided. Ask how escalation works. If the project manager is unavailable, who is the backup?
Ask for a written escalation matrix. Who is notified when a delay occurs? Who is notified when a defect is found? How long does the molder take to respond? How long does it take to provide a root cause?
For ongoing projects, ask for a joint risk review. Ask the molder to walk through its top five risks. Ask it to walk through its top five mitigations. Ask for a written summary.
Red flags:
- No single point of contact is named
- Status updates are only provided on request
- No escalation matrix exists
- The molder takes more than 48 hours to respond to a nonconformance
- The molder cannot provide a written summary of the risk review
A molder that cannot communicate risk clearly is a molder that has not planned for it.
Review the contingency plan as a package
Do not review each area in isolation. A good molder has a written contingency plan that ties all five areas together. The plan should identify the top risks and the response for each.
Ask for a one-page contingency plan. It should name the top five risks, the owner for each, and the response. It should include a contact list for key personnel and key suppliers. It should include a timeline for response.
Ask the molder to walk through the plan. Ask it to explain how it would handle a mold failure, a material shortage, a labor shortage, a quality defect, and a communication failure. Ask for the last time each response was tested.
Red flags:
- No written contingency plan exists
- The plan is generic and not specific to the project
- The plan has no owners or timelines
- The molder cannot explain how the plan would work in practice
A molder that has a written plan and can explain it is ready. A molder that has a plan but cannot explain it is not.
| Risk Area | Key Question | Red Flag |
|---|---|---|
| Tooling | Who owns the mold and what is the repair plan? | No maintenance schedule or transfer conditions |
| Materials | How is material sourced and traced? | No lot traceability or approved supplier list |
| Labor | Who is trained on the tool and how is coverage managed? | Single operator with no backup |
| Quality | How are nonconformances handled and tracked? | No quality data or corrective action tracking |
| Communication | How are delays and defects reported? | No escalation matrix or single point of contact |
Score the molder before awarding work
Use the checklist to score the molder. Assign a weight to each area based on your project. For a new part, quality and tooling may carry more weight. For a high-volume part, capacity and communication may carry more weight.
Do not award work based on price alone. A low price does not offset molder risk. A molder that cannot show a plan is not a low-risk supplier. It is an unknown supplier.
The goal is not to find a perfect molder. The goal is to find a molder that has thought about failure and has a plan for it. That molder will not prevent every problem. But it will respond to problems in a way that keeps your project moving.
Frequently asked questions
How often should I review molder risk?
Review molder risk before awarding work, after the first production run, and at least quarterly during ongoing production. Increase the frequency if the project is new, high-volume, or critical.
What documents should I ask for during molder evaluation?
Ask for the quality plan, control plan, PPAP or equivalent, maintenance schedule, material supplier approval list, and a written contingency plan. These documents show whether the molder has planned for failure.
How do I verify supplier risk controls?
Check for a written risk plan, a named single point of contact, and a history of closed corrective actions. Ask the molder to walk through its top five risks and its response for each.
What is the most common molder risk?
The most common molder risk is communication. A delay or defect is not reported in time. The buyer finds out from a customer complaint. Always check the escalation path before awarding work.
Can I rely on a molder's verbal assurance?
No. Verbal assurance is not a plan. Ask for written documentation and ask the molder to explain how it would handle a specific failure. If it cannot, treat the risk as unmanaged.
