Supplier ESG Questionnaires: How a Small Machine Shop Answers
A supplier ESG questionnaire arrives with 60 questions, a scoring rubric and a deadline. Half assume a sustainability team and a data platform. You have a workshop, an electricity bill and a quality manager with a full-time job.
The instinct is to fill every box so the score looks good. That is the risky approach. Buyers compare answers across suppliers and audit the ones that look too polished. A shop that says "we do not measure this yet, here is what we do instead" scores better over time than one that invents a number it cannot defend.
What actually arrives
Three formats dominate.
Scored platforms. EcoVadis and similar assessments score environment, labour, ethics and procurement. They reward documented policies, measured data and verification, and penalise unsupported claims; a mid-range first score is normal.
Customer-built questionnaires. A spreadsheet or portal with 40-120 questions, usually contract-linked: a poor answer can hold up onboarding.
Code of conduct acknowledgements. A document committing you to labour standards, anti-bribery and legal compliance. Signing is easy; the audit behind it is not.
Energy and emissions: the numbers you can defend
Most questionnaires want electricity consumption, sometimes fuel, a carbon figure, and an intensity metric per unit of output. Start with what the utility bills already prove: twelve months of invoices give kilowatt-hours, a date range and a meter number, which is auditable data and worth more than a modelled estimate.
Then convert. Take a shop consuming 420,000 kWh a year and shipping 38,000 parts. That is about 11 kWh per part, a number you can defend and trend. Apply a grid emission factor — for mainland China roughly 0.55-0.6 kg CO2e per kWh depending on the year and region — and you get around 230-250 tonnes CO2e. Label that Scope 2, location-based, and name the factor and its source.
Scope 1 is usually small in a machine shop: a diesel forklift, a gas-fired heater, a standby generator. If you buy 4,000 litres of diesel a year, that is around 10.6 tonnes CO2e using a standard factor of about 2.65 kg per litre. Say so, and say what you excluded.
What you should not do:
- Claim to be "carbon neutral" without an offset programme you can name.
- Report a Scope 3 figure you have not calculated; for a machine shop that requires upstream data you do not hold.
- Present an intensity figure without stating the denominator. 11 kWh per part means nothing unless the reader knows whether that is per finished part, per shipment or per revenue unit.
If a customer asks for Scope 3, the honest answer is that purchased goods dominate and you can supply material mass by grade, letting them apply their own upstream factors.
See also: Sending CAD Data to a Machine Shop: What to Control and CBAM and Machined Metal Parts: The Supplier View.
Labour and human rights
Questions here are usually yes/no against a standard: no child or forced labour, freedom of association, hours within legal limits, minimum wage, non-discrimination, health and safety.
For a legal employer with formal contracts and social insurance, most answers are a straightforward yes with the control described. The failure mode is over-claiming on hours. If peak season runs 60-hour weeks, do not tick the box saying hours never exceed 48 including overtime. State the actual pattern, the legal limit and how overtime is compensated.
Evidence that works:
- Employment contracts and the social insurance registration record.
- Payroll showing minimum wage compliance, with the calculation.
- An attendance system export showing hours distribution over 12 months.
- Safety records: training log, incident register, PPE issue records.
- A named person responsible for labour compliance.
Audits of small suppliers focus on whether the answer matches the payroll. Nothing damages credibility faster than a stated 45-hour week that the attendance data contradicts.
Governance, ethics and the rest
Anti-bribery. A written policy, a named owner, a gift declaration threshold and a conflicts process. A two-page policy signed by the general manager is a real control for a 60-person company; saying you have none because you are too small is a worse answer than adopting one this month.
Conflict minerals. Answer at the material level. If your parts are aluminium, stainless and carbon steel, "no 3TG present" is supportable from the alloy specification. If you machine bronze or cobalt alloys, say which, and describe the country of origin inquiry you ran.
Data protection and security. Do not claim a certification you do not hold. Describe access control, backups, multi-factor authentication and retention instead; that is what the assessor is trying to establish.
| Common question | What you can evidence | Realistic answer |
|---|---|---|
| Total electricity consumption (kWh) | Utility invoices, 12 months | Give the figure with the period and meter reference |
| Renewable electricity share | Contract or tariff | "0% contracted; no on-site generation" is a complete answer |
| Scope 1 and 2 emissions | Fuel invoices plus grid factor | Report both, name the factor, state the boundary |
| Waste generated and recycled | Hauler receipts, scrap dealer records | Tonnes by stream; aluminium and steel scrap dominate |
| Certified management system | Certificate, if held | If none, describe practices and any planned certification |
| Working hours | Attendance export | Give the actual distribution, not the policy target |
| Forced or child labour | Contracts, age verification, recruitment process | Yes/no plus the control that prevents it |
| Anti-bribery policy | Signed policy, gift register | Provide the document and the owner's name |
| Conflict minerals status | Material specs, CMRT | Declare by material, not by company slogan |
| Grievance mechanism | Procedure and log | Describe the channel and how many cases were raised |
None of those answers requires a sustainability department — just the records and someone to assemble them once.
Where to say "no data", and how to say it
Refusing to answer loses points; answering badly loses trust. The middle path is a structured partial answer:
- State what you measure and over what period.
- State what you do not measure and why.
- State the method you would use if asked to measure it.
- Give a date by which you could supply it.
"We do not currently sub-meter the plating line, so we cannot separate its electricity from shop total. The shop total is 420,000 kWh for the last 12 months. If separation is required, we can install a meter on that circuit and report a full year from next quarter."
A platform scores that as partial; a human scores it as credible, and the human matters more.
Keep a master file of your answers. The same questions arrive from five customers in different wording, and inconsistent numbers across submissions are the most common way a small supplier gets flagged. Version the file and update the figures annually.
Our own position is on about — deliberately factual rather than aspirational. If a questionnaire asks for a data point you need from us, contact; we would rather give a number with a stated method than a polished figure we cannot support.
Frequently asked questions
Will a poor ESG score disqualify us from a tender?
It can, particularly with large buyers who apply a threshold. More often it feeds a weighting rather than a pass/fail gate, and a supplier with modest but well-evidenced answers outperforms one with strong claims and no documentation. Ask how the score is used before investing heavily.
Do we need a certified environmental management system to score well?
It helps, but it is not the only route. Documented procedures, measured data and a credible improvement plan earn credit. What does not work is claiming alignment with a standard you have not been assessed against; that is checkable and undermines the rest.
How do we calculate emissions without a consultant?
Use invoices: electricity and fuel, twelve months, plus published emission factors. Multiply, sum, and state the boundary and the factor source. That gives a defensible Scope 1 and 2 figure for a small shop. What you cannot do cheaply is Scope 3; say so rather than estimating loosely.
What if a customer's questionnaire asks about our own suppliers?
Describe the flow-down you actually apply: a code of conduct acknowledgement at onboarding, a conflict minerals request at material level, and a requirement that subcontract finishers hold environmental permits.
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