What Should I Look for When Choosing a Supplier? Customer wants criteria for evaluating suppliers
Martin Signer answers:
Choosing the right supplier is one of the most consequential business decisions you'll make — a bad one costs you time, money, and customers. Here's a complete evaluation framework.
The 7 Core Criteria
1. Quality & Consistency
The most important factor long-term. A supplier can be cheap and fast but worthless if quality is unreliable.
- Ask for samples from multiple production runs, not just their best showcase piece
- Request their quality control documentation (ISO certification is a strong signal)
- Ask how they handle defects — their answer reveals a lot about their standards
- Check if quality holds at scale — some suppliers are great at samples, poor at volume
2. Reliability & Lead Times
- Do they hit their promised delivery dates consistently?
- Ask for references and specifically ask referees about on-time delivery
- Request their average lead time for first orders vs. repeat orders
- Ask what happens during peak seasons — do lead times balloon?
- Check how they handle supply chain disruptions
3. Financial Stability
A supplier who goes under mid-order is a nightmare scenario.
- For significant relationships, request basic financial references
- Check how long they've been in business — 5+ years is a reasonable baseline
- Be cautious of suppliers heavily dependent on one or two clients
- In Europe, you can check company registries (Zefix in Switzerland, Handelsregister in Germany) for basic filings
4. Communication & Responsiveness
This predicts the entire relationship quality.
- How quickly do they respond during the vetting process? (If slow now, it won't improve)
- Do they answer questions directly or deflect?
- Is there a dedicated contact person or do you get passed around?
- Can they communicate in your language or a shared one fluently?
- Response time benchmark: under 24 hours for email, same day for urgent issues
5. Pricing & Payment Terms
Price matters but should never be the primary criterion.
- Get quotes from at least 3 suppliers for genuine comparison
- Understand total cost: unit price + shipping + duties + quality control + your time
- Negotiate payment terms — 30% deposit / 70% on delivery is standard and reasonable
- Be wary of prices significantly below market — they signal compromises somewhere
- Ask about volume pricing tiers and annual contract discounts
6. Capacity & Scalability
Your supplier needs to grow with you.
- What is their current production capacity?
- How much of their capacity are you likely to consume?
- Can they scale if your order doubles in 12 months?
- Do they have backup capacity or secondary production facilities?
- Avoid being more than 30–40% of a small supplier's revenue — creates dependency risk on both sides
7. Compliance & Ethics
Increasingly important for EU/Swiss market access and brand reputation.
- Do they comply with relevant regulations (CE marking, REACH, food safety, etc.)?
- Request documentation of labor practices and environmental standards
- For EU/Swiss sales, supplier compliance with product safety regulations is your legal responsibility too
- Ask about their own supplier chain — issues two tiers down can become your problem
The Evaluation Scorecard
Use this to compare suppliers objectively:
| Criterion | Weight | Supplier A | Supplier B | Supplier C |
|---|---|---|---|---|
| Quality consistency | 25% | /10 | /10 | /10 |
| Reliability / lead times | 20% | /10 | /10 | /10 |
| Communication | 15% | /10 | /10 | /10 |
| Pricing & terms | 15% | /10 | /10 | /10 |
| Capacity & scalability | 10% | /10 | /10 | /10 |
| Financial stability | 10% | /10 | /10 | /10 |
| Compliance & ethics | 5% | /10 | /10 | /10 |
Adjust weights based on your business priorities — a food business might weight compliance at 20%, a fast-fashion startup might weight scalability higher.
Questions to Ask Every Supplier
About quality:
- What does your QC process look like at each production stage?
- What is your typical defect rate?
- How do you handle a batch with quality issues?
About reliability:
- What was your on-time delivery rate last year?
- How do you communicate if there's going to be a delay?
- What's your contingency if a key raw material is unavailable?
About the relationship:
- Who will be my main point of contact?
- How do you prefer to communicate — email, WhatsApp, video calls?
- Can you provide three client references I can speak with directly?
Green Flags vs. Red Flags
| Green flags | Red flags |
|---|---|
| Proactively shares certifications | Vague or evasive about quality processes |
| Offers references unprompted | Reluctant to provide references |
| Asks detailed questions about your needs | Only talks about price |
| Acknowledges past mistakes honestly | Claims zero defect history |
| Clear dedicated contact person | You always speak to someone different |
| Transparent about capacity limits | Claims unlimited capacity |
| Suggests a small trial order first | Pushes immediately for large commitments |
The Trial Order Rule
No matter how impressive a supplier looks on paper, always start with a small trial order before committing to volume. Evaluate the trial on: quality vs. sample, actual vs. promised lead time, packaging and labeling accuracy, communication during production, and how they handle any issues that arise. A supplier who handles a small problem well on a trial order will handle big problems well later.
Swiss/European Context
From Winterthur, you have access to some of the world's most reliable manufacturers in Germany, Austria, and Northern Italy — particularly for precision goods, industrial components, and food products. While unit costs are higher than in Asia, you gain shorter lead times, easier auditing, simpler logistics, fewer currency risks, and stronger legal recourse. For products where quality and consistency are critical, European suppliers often deliver better total value than the headline price difference suggests.
