When should work be stopped?
Action is warranted when conditions could lead to serious harm in the immediate future. The concept of serious and imminent risk also includes certain exposures whose health effects appear later. It is not necessary to wait for an injury to occur before taking protective measures.
The situation must be assessed based on the facts and working conditions: the state of equipment, available protective measures, substances, the environment, and the people exposed. A discrepancy in documentation does not in itself equate to immediate danger, but neither can the lack of a measurement or a definitive report be used to ignore clear signs of a hazardous situation.
Company obligations
Article 21 of the Occupational Risk Prevention Law requires that affected individuals be informed as soon as possible and that measures and instructions be taken to enable them to stop working and leave the premises when necessary. The response must also allow for action to be taken, within the scope of available knowledge and resources, even if it is not possible to contact a supervisor.
The organization needs to plan how to stop the process without creating additional hazards. Stopping a machine, isolating energy sources, and evacuating an area are all different actions. Preventive measures and the emergency plan must clearly define who is responsible, how they provide notification, and the limits of their intervention.
Individual right to interrupt activity
Workers may interrupt their work and, if necessary, leave the workplace when they believe there is a serious and imminent risk to their life or health. This procedure does not require waiting for a vote by representatives or an inspection visit. It should be distinguished from the collective work stoppage procedures provided for in the same law.
Legal protection against adverse consequences for taking these actions includes exceptions for bad faith or gross negligence. In day-to-day operations, clear warnings and a rapid response are essential. Communicating the situation and identifying potentially exposed individuals helps protect others without requiring anyone to remain in danger to document it.
Agreement of the workers’ representatives
When the company fails to adopt or permit the necessary measures, the legal representatives may, by majority vote, agree to halt the work of the affected individuals. This agreement is immediately communicated to the company and the labor authority, which must either annul or ratify it within twenty-four hours, in accordance with Article 21.
If urgency prevents a meeting of the representative body, the decision may be adopted by a majority vote of the prevention delegates. The role of the prevention delegate should not be confused with unlimited individual authorization for any collective work stoppage. The method used, the reasons for the action, and the communications made must be identified.
Order of the Labor Inspectorate
The Labor and Social Security Inspectorate may order an immediate work stoppage when it determines that a preventive measure violation poses a serious and imminent risk. The company must notify the affected employees and their representatives and report to the Inspectorate that it has complied with this notification.
The appeal does not suspend the obligation to comply immediately. Article 44 establishes a period of three business days to appeal to the labor authority and twenty-four hours for a decision. The work stoppage may be lifted by the Labor Inspectorate or by the employer when the causes are remedied; in the latter case, the employer must immediately notify the Labor Inspectorate.
Protect, fix, and resume
Stopping operations is the first step in protection, not the end of the problem. Access or startups incompatible with the situation must be prevented, potential emergencies must be addressed, and coordination between participating companies must be established. Technical actions must be carried out by competent personnel with the necessary resources, avoiding improvisation during the pressure to recover production.
Resumption of work requires verification of corrective measures and compliance with the notification requirements and conditions of the applicable legal procedure. It is advisable to document what was corrected, who verified it, and what conditions must be maintained. A verbal instruction to return to work does not demonstrate that the causes have been eliminated, nor does it replace a necessary technical inspection.
Practical example
During an intervention, access to a potential entrapment zone is detected while the equipment is in a position to start up. Work is stopped, exposed personnel are moved to safer locations, and the situation is reported. Competent personnel implement the isolation procedure and investigate why the planned protective measures were not adequately ensuring the intervention.
Before resuming operations, control of hazardous energy sources and the effectiveness of the measures implemented for the task are checked. If an inspection order was in place, its requirements and communications are also addressed. The lessons learned are incorporated into maintenance and organizational procedures to prevent the next shift from experiencing the conditions that caused the shutdown.
Documentation and common errors
A useful log contains the location, task, time, observed facts, extent of the disruption, notices, and verifications. It may include photographs taken without additional exposure, technical reports, and evidence of corrective actions. The documentation should describe events and decisions, avoiding assigning personal responsibility before analyzing what happened.
Common mistakes include waiting for an accident to happen, confusing an emergency shutdown with safe isolation, or restarting due to production pressure. It’s also a mistake to treat all shutdowns as if they followed the same procedure. An effective response combines immediate protection, identification of the applicable legal avenues, and a proven solution to the root causes.
