Industrial cafeterias in San Luis Potosí: questions to ask
To hire an industrial cafeteria provider in San Luis Potosí with sound judgment, ask for evidence on seven fronts: hygiene, menu, capacity per shift, staff, continuity, measurement, and contract. A good provider answers with documents, records, and dates.
This guide gives you the specific questions and, for each one, which answer is a good sign and which should stop you. Use it during the sales visit or as an attachment to your request for quote.
Why the interview matters more than the tasting
The tasting tells you how the provider cooks on a day when it knows it is being evaluated. It does not tell you what happens on an ordinary Tuesday, with two cooks out and extra people to feed because of overtime.
At a large plant, mistakes are expensive. According to the 2024 Economic Census by INEGI (Mexico's national statistics agency), establishments with more than 250 employees make up 0.2% of all establishments in the state and employ 29.4% of the workforce. A cafeteria that fails at one of those plants affects hundreds or thousands of people on the same day.
That is why it pays to ask about systems, not dishes.
1. Hygiene and standards
The mandatory standard for any cafeteria is NOM-251-SSA1-2009 (Mexico's mandatory food hygiene standard), which covers hygiene practices for food processing. Its chapter 7 applies to food service establishments. Distintivo H (a federal food-handling designation), by contrast, is voluntary, is granted to a specific establishment, and lasts one year.
| Question | Good sign | Red flag |
|---|---|---|
| Which hygiene standard do you comply with, and how do you prove it? | Cites NOM-251 and shows real records from a cafeteria in operation | Cites NOM-093, which NOM-251 itself canceled |
| At what temperature do you hold food on the serving line? | Hot food above 60 °C and cold food at 7 °C or below (section 7.3.3), with a record for each meal period | "It always comes out hot" |
| Do you have Distintivo H? | Hands over the current certificate, with the establishment's address and expiration date, or clarifies that what it has is trained staff | "We're a certified company" with no document |
| Who handles pest control? | Shows the certificate for the contracted service (section 5.10.11) | Doesn't know who does it or how often |
| How do you control the water? | Keeps a daily record of free residual chlorine (section 5.8.1) | "We use bottled water" and nothing more |
Ask to see last week's records, not a blank form. Temperature, cleaning, and receiving logs are standard practice in the industry; a serious provider keeps them even when no one asks. The details are in what NOM-251 requires of an industrial cafeteria.
2. Menu
The menu is what employees see every day. The underlying question here is whether there is a written plan or whether the menu gets decided during the week based on whatever is on hand.
| Question | Good sign | Red flag |
|---|---|---|
| Can I see the full menu for next month? | Hands it over in writing, by day and by shift | Only shows photos or a "sample" menu |
| How often does a dish repeat? | Gives a clear rule that you can check against the calendar | "We try to vary it" |
| Who designs the menu, and on what basis? | Explains the nutritional criteria and how they are adjusted to the type of work | The menu depends on the cook at each cafeteria |
| What options are there for people with diabetes, hypertension, or allergies? | Has a protocol and describes it step by step | "Have them tell us and we'll see" |
| Does the third shift eat the same as the first? | Has a menu designed for the night | Reheated food from the previous shift with no controls |
As a content reference, the Ley de Ayuda Alimentaria para los Trabajadores (Mexico's Workers' Food Assistance Law) defines a proper diet as complete, balanced, healthy, sufficient, varied, and adequate. It works as a yardstick for reading any proposal.
3. Capacity per shift
The Ley Federal del Trabajo (Federal Labor Law, or LFT) sets, in Article 63, a minimum break of half an hour in a continuous workday. If your plant gives that minimum, every minute in line comes out of the worker's mealtime.
| Question | Good sign | Red flag |
|---|---|---|
| How many people can you serve at my plant's peak hour? | Asks for your break schedules and calculates with them | Gives a round number without seeing your operation |
| How do you size serving lines, staff, and equipment? | Proposes staggering groups or opening a second line | "No problem, we'll adapt" |
| What happens with unplanned people on overtime? | Has a procedure and an agreed minimum notice | It gets solved "on the fly" |
| Which meal periods do you cover? | Details breakfast, lunch, dinner, and night service, with times | Only talks about first-shift lunch |
Ask for the wait time in line, measured at a plant the provider already serves.
4. Staff
People run the cafeteria. The chef's résumé matters less than the system for training and backup coverage.
| Question | Good sign | Red flag |
|---|---|---|
| How many people would you assign to my cafeteria, and in which positions? | Staffing by shift, with an on-site manager | "As many as needed" |
| What training do they receive, and what is the evidence? | Certificates per person in hygienic food handling, safety, and first aid | "On-the-job" training |
| How do you cover absences? | Floating staff or backups who are already trained | The manager "jumps in" to cook |
| Are you registered in the REPSE? | Shows its current registration with the STPS | Doesn't know what you're talking about |
On that last point: Article 15 of the LFT requires anyone providing specialized subcontracting services to register with the STPS (Mexico's Ministry of Labor), renewable every three years. That registry is the REPSE (Mexico's registry of specialized service providers). A cafeteria operated inside your plant with the provider's staff normally falls under that requirement.
5. Continuity
A cafeteria cannot close. Ask about the bad days.
| Question | Good sign | Red flag |
|---|---|---|
| What do you do if the gas, the water, or a piece of equipment fails? | Written plan with an alternative way to serve | "It's never happened to us" |
| How many ingredient suppliers do you work with? | Defined suppliers and a backup per category | Buys daily based on price |
| How do you operate during line stoppages, inventory counts, and holidays? | Adjusts production with notice and puts it in the contract | Charges for full service regardless of attendance |
| How long does startup take? | Schedule by stage: equipment, staff, trial runs | "Next week" |
If you are coming from another provider, ask how they would handle the transition without leaving a shift without service.
6. Measurement
What is not reported does not get corrected. There is no official standard of indicators for cafeterias, so the one who defines what gets measured is you.
| Question | Good sign | Red flag |
|---|---|---|
| What do you report to me each month? | Satisfaction, hygiene audits, menu compliance, complaints, and waste | "We'll let you know if anything comes up" |
| How do you collect employee feedback? | Regular survey with shared results | A suggestion box no one opens |
| Do you accept unannounced audits by me or by my customer? | Yes, and they put it in writing | They ask for several days' notice |
| What happens when there is a food safety complaint? | Protocol with an owner, a deadline, and retained samples | It is handled "case by case" |
The full list is in which KPIs to ask your cafeteria provider for.
7. Contract
This is where it gets decided whether what was promised can be enforced.
- Billing unit. Ask whether you are charged per person served, per dish, or with a guaranteed minimum. Good sign: the provider explains what happens if headcount drops.
- Price adjustment. Good sign: an agreed formula and frequency. Red flag: "we review it when ingredient costs go up."
- Equipment and facilities. Put in writing who supplies and who maintains stoves, refrigeration, dishware, and furniture.
- Portion weights and specifications. Good sign: they go in an attachment. Red flag: they are left to the kitchen's discretion.
- Employee contribution. If the worker pays part of the meal, define who collects it and how it is recorded. It has tax and social security effects that your accountant should review.
- Exit. Notice period, handover of the facilities, and what happens with the equipment.
To compare proposals on the same terms, read how much an industrial cafeteria costs before asking for prices.
How to score the answers
Build a table with the seven sets of questions and score each provider with three values:
- Document. The provider answered with a record, certificate, or procedure you were able to see.
- Explanation. The provider answered in detail, but without evidence.
- Promise. The provider answered with a single sentence.
Rule out anyone with promises on hygiene or continuity. Then visit a cafeteria that is already operating, at peak hour and without a prepared tour.
Who GAC already serves
Grupo Alimenticio del Carmen comes to these questions with experience at volume: cafeterias for Martinrea (2,000 employees), Eaton (2,000 workers), PSW (1,300), and Kautex (200), listed on the clients page. Ask every provider on your list for the same thing: named plants and the headcount at each.
Frequently asked questions
Is my company required to have a cafeteria?
Not as a general rule. The Ley de Ayuda Alimentaria para los Trabajadores is voluntary, and the LFT only requires employers to provide food for certain categories of work. What is mandatory is the minimum half-hour break in a continuous workday, and the cafeteria can be mandatory too if it is agreed in your collective bargaining agreement.
Is Distintivo H mandatory for an industrial cafeteria?
No. It is a voluntary designation granted to a specific establishment, and it expires after one year. What is mandatory is compliance with NOM-251-SSA1-2009. If a provider says it has Distintivo H, ask for the certificate with the address and validity dates.
How many providers should I evaluate?
Three comparable proposals are enough to see real differences. What matters is that all of them quote on the same data: people served per shift, meal periods, operating days, and who supplies the equipment.
Is it worth asking for a tasting?
It is useful for ruling providers out, not for deciding. Round it out with a visit to a cafeteria in operation and a review of hygiene records. What you are measuring is consistency, and that does not show in a single meal.
Which documents should I ask for before signing?
Recent hygiene records, staff training certificates, the pest control service certificate, current REPSE registration, the menu for the month, and the startup plan. If any of them does not exist, have it written into the contract as a commitment with a date.
Request a proposal with these questions on the table
If you are evaluating providers, send us this list. At GAC we answer it with your operation in view: people served, shifts, and facilities.
