4. A safe system of work
A safe system of work is often the most important and most flexible part of the employer’s duty. It concerns the way the work is organised and carried out, including instructions, sequencing, staffing, coordination, training, precautions, and emergency arrangements.
This matters because many workplace injuries are not caused by a broken building or a faulty machine. They are caused by bad planning, poor communication, rushed procedures, missing safeguards, or a work process that exposed the employee to avoidable danger.
An employer’s responsibility is not satisfied merely by writing a safety manual or giving a one-time instruction. The duty has two connected parts.
First, the employer must devise a reasonably safe system of work. This means considering the nature of the job, the risks involved, the experience of the workers, the equipment being used, and the environment in which the work is done. The system must be reasonably safe in light of the inherent dangers of the work.
Second, the employer must take reasonable steps to ensure that the system is actually operated in practice. Safety rules that exist only on paper may not be enough. The employer may need to provide training, reminders, monitoring, and active supervision to make sure the system is followed. If management knows that safety rules are being habitually ignored and does nothing, the employer may be in breach of his personal duty.
Supervision therefore matters. In many jobs, especially for younger, inexperienced, or untrained workers, it is not enough to hand over equipment and assume they will work it out safely for themselves. Proper instruction and oversight may be required.
The level of supervision is fact-sensitive. A skilled and experienced worker may need less direct instruction, while a new worker, a worker facing unusual risks, or a worker dealing with dangerous machinery may need much more careful guidance. The central question is whether the employer has both created a reasonably safe system and taken reasonable steps to see that it is followed.
Language communication barriers can matter. If a worker’s limited understanding of English increases the risk to others, that may require the employer to take extra care in training, supervision, and work organisation.
The distinction between a fellow employee’s “casual act of negligence” and the employer’s own breach often comes down to whether the accident reflects a deeper failure in the managerial system. If the real problem is the system, the employer may be directly liable even though another worker made the immediate mistake.
A safe system may require, for example:
- Clear instructions for carrying out hazardous tasks.
- Proper staffing levels and coordination between workers.
- Safe methods for lifting, moving, or handling loads.
- Safe procedures for dealing with third-party violence or dangerous patients, customers, or outsiders where the risk is known.
Effective arrangements for inspection, reporting, and responding to hazards.



