Every business that runs outside office hours meets exceptions: a delivery that arrives at two in the morning, a system that stalls during an overnight batch, a client whose urgent request lands after the office has closed. Somebody has to deal with each one. In many businesses the somebody is the same person, or the same small group, week after week, and nobody ever decided that it should be so.
This piece looks at how night-time and after-hours exceptions drift toward the people who are known to be reliable, and what that does to them and to the business. It is a hypothesis drawn from general research on shift work and fatigue, not a finding about any particular South African employer.
How exceptions find the willing
An exception is, by definition, outside the plan. There is no roster entry for it and no rule about who is next. So the person making the call at that hour reaches for whoever is most likely to answer and most likely to fix it. That is usually someone with experience, a good phone habit and a reputation for not making a fuss.
Each time that person says yes, the pattern hardens. The next exception goes to them first, because the last one went well. The supervisor is not being unkind; the supervisor is being efficient at three in the morning. But the efficiency is paid for by someone else's sleep.
There are usually three forces behind the drift:
- Knowledge sits in one head. The person who knows how to restart the job or override the lock becomes the default, because writing it down was never anyone's task.
- Goodwill is invisible. A willing colleague's extra hours do not appear on a roster, so nobody sees the imbalance building.
- No one owns the rule. Without a stated order of call-out, the order is whatever is quickest in the moment.
What the research says about night work
The UK Health and Safety Executive's guidance on fatigue explains that tiredness reduces alertness and judgement, that night work and long or irregular hours are among its main causes, and that fatigue is a risk to health and safety, not only a matter of comfort. The point matters for exceptions in particular. An exception is the moment when sound judgement counts most, and it is being asked of the person who has had the least sleep.
The World Health Organization's guidance on mental health at work lists excessive workloads, long or inflexible hours and low control among the working conditions that can harm wellbeing. A person who is repeatedly woken for exceptions has little say over when the work arrives, which is exactly the lack of control that guidance describes.
In South Africa, the Basic Conditions of Employment Act contains provisions on night work, overtime and rest periods for the employees it covers. Coverage and thresholds depend on the role and on any sectoral determination, so a business should check the current position for each job instead of assuming that goodwill call-outs sit outside the rules.
An illustrative case
Consider an illustrative example, not a real case: a Durban cold-storage and distribution firm with a night crew of eight. A refrigeration alarm sounds, a truck arrives with the wrong paperwork, a scanner fails mid-load. The night supervisor phones the senior controller, who lives ten minutes away, because the controller once fixed a similar fault and always picks up.
Over a year, the controller is called out far more often than the rest of the crew combined. Nobody planned this. He is respected, which is pleasant, and exhausted, which is not. He begins to dread his phone, and his partner begins to resent it. When he finally asks for a fortnight of uninterrupted nights, the supervisor realises that three of the fixes exist only in his memory.
The human tax: dignity and energy
The first cost is energy. Broken sleep does not stay at work. It follows a person into the next day, the next week and the family's routines, and recovery takes longer than the interruption did.
The second cost is dignity. Being the dependable one can feel like recognition at first. When the extra load is never named, never shared and never acknowledged in pay, time off or progression, the same dependability becomes a quiet form of being taken for granted. The person who always says yes loses the ability to say no without it being read as a change of character.
There is also a cost to the people who are not called. They miss the chance to learn the fixes and to be trusted with the hard moments, and they may be passed over for the reputation that exceptions build. An uneven burden is also an uneven opportunity.
What could realistically change
The aim is not to eliminate exceptions, which any real operation will have. It is to make the handling of them a visible, shared and fairly rewarded part of the job. The business case for that reaches beyond fairness, because a process that depends on one person's phone is a single point of failure. The note on the morning check that overnight jobs ran describes how much calmer a night can be when the routine checks are not carried in someone's head.
Practical next actions
- Count the call-outs. For the last three months, list each out-of-hours exception, who was contacted and how long it took. Most businesses are surprised by how concentrated the list is.
- Write a call-out order. Agree a rotation or a named sequence, and publish it. A stated order replaces the unspoken one and lets people plan their own nights.
- Write down the top five fixes. Ask the person who is called most often to record the five exceptions they handle most, with the steps, in plain language. Have a second person follow the notes once, to test them.
- Decide what extra hours earn. Settle in advance whether a call-out is paid, taken back as time off, or both, and check the arrangement against the Basic Conditions of Employment Act and any sectoral determination that applies.
- Set a recovery rule. After a broken night, the person starts later or finishes earlier the next day, without having to ask. The guidance in when payroll week means late nights for one person shows how such rules can be tied to specific peaks.
The business outcome
A fair rotation protects the business from the day its most reliable person leaves, falls ill or simply stops answering. It spreads knowledge, shortens the time to fix a fault and reduces the errors that come from tired judgement. It also makes the real cost of out-of-hours cover visible, which is the first step to reducing it, for example by fixing the faults that cause repeated call-outs. Where the exceptions themselves are the problem, when the exception process is the only way to get things done is a useful companion read.
The human dividend
The dividend is time and predictability. People who know when they might be called, and know that the burden rotates, can plan their sleep, their family evenings and their recovery. Dignity follows: the willing colleague is thanked with structure and fair reward, not with the next call. What each person does with their reclaimed nights is their own business, whether that is sleep, study, family or nothing in particular.
The trade-offs
- Rotation can lengthen response time. The most experienced person may not be first on the list, so documentation and a short escalation route are needed.
- Some people want the extra work. A volunteer for more call-outs may be doing it for pay or recognition, so the arrangement should allow choice, within the limits that the law and fatigue set.
- Documentation takes effort. Writing the fixes down costs time up front and needs upkeep as systems change.
- Small teams have little slack. A crew of three cannot rotate as freely as a crew of eight, and may need shared cover with another site or a paid on-call arrangement.
Why it matters
Exceptions test a business at its thinnest hour, and the way it handles them shows what it values. When the load lands on the same few people by default, the business is spending their health and goodwill without a budget line. When it is shared, written down and rewarded, the same exceptions become manageable, and the people who carry them can keep doing so for years.
Sources and further reading
- Fatigue - HSE
- Mental health at work (last verified 10 October 2026)
Related Mellorca reading
- The Receptionist Juggling Four Booking Systems
- The Customer Service Agent Apologising for a Broken System
- Why Being Blamed for System Errors Wears People Down