A four-day-week trial should answer a business question, not stage a popularity contest.
Can the organisation maintain the outcomes customers and the business need in fewer working hours, without quietly compressing five days of strain into four?
That requires a baseline. If output, service, quality and workload are not measured before the trial, leaders will be left comparing opinions after it.
Maximum4 begins with the Map, the first stage of our MERA method: Map, Eliminate, Redesign, Automate. The aim is to understand how work currently runs, remove waste and redesign what remains before reduced hours are treated as the result.
Define the version of the four-day week
“Four-day week” can describe different arrangements. A useful trial states exactly what is changing.
Define:
- the reduction in contracted or expected hours;
- whether pay remains at the full-time level;
- which teams and roles are included;
- how customer coverage will work;
- how part-time, shift-based or atypical roles will be treated;
- the start, end and review points;
- what would cause the trial to pause or change.
Do not leave teams to interpret the policy individually. Ambiguity makes the operating data difficult to compare and can create unfairness between roles.
Establish the baseline before reducing hours
Measure a normal period long enough to show ordinary variation. Avoid choosing an unusually quiet month merely because it makes the trial easier.
The baseline should cover five areas.
1. Output
Choose measures that describe completed value rather than visible activity. Depending on the business, that might be cases resolved, projects delivered, customer requests completed, revenue-producing work or another clearly defined output.
Email volume, meetings attended and hours online are usually weak substitutes for useful work.
2. Service
Track what customers experience: response time, turnaround time, deadlines met, availability, complaints or another relevant service measure.
A shorter week that protects internal output by making customers wait longer has not maintained the same outcome.
3. Quality
Include errors, rework, returns, escalations or professional quality measures. Speed can improve while quality falls, particularly when teams are trying to prove that the trial works.
4. People and workload
Track overtime, work spilling into the returned day, absence, fatigue, perceived workload and whether employees can disconnect. Ask whether the new week feels sustainable, not merely whether people prefer the extra day.
The UK pilot measured employee experience at the beginning, middle and end rather than relying on one survey after completion.
5. Business health
Use measures such as revenue, margin, retention, absence or hiring where they are relevant and available. The 2022 UK pilot gathered common company metrics including revenue, absenteeism, resignations and new hires, alongside organisation-specific measures.
Not every metric will move during a short trial. Decide in advance which measures are leading indicators and which need longer observation.
Redesign the work before the trial
A four-day week is not created by deleting Friday from the calendar. If the same meetings, approvals, reports and manual administration remain, the work will be compressed or pushed into personal time.
Map the processes that consume the most team capacity. Then:
- stop activity that does not change an outcome;
- shorten or remove unnecessary meetings;
- clarify decisions and approval authority;
- improve the quality of information entering the process;
- redesign hand-offs between teams;
- automate stable routine work where the data and rules are ready;
- protect the human work that depends on judgement, trust and care.
CIPD’s employer research reflects the practical challenge: many employers believe productivity improvement, better people management and technology investment would be needed to reduce hours without reducing pay. It also highlights questions around atypical and non-salaried workers. Those issues should be designed into the trial, not discovered afterwards.
Measure during the trial, not only at the end
Use a small dashboard that the leadership team and participating employees understand. Review it at agreed intervals, looking for trends and trade-offs rather than reacting to one difficult week.
Ask:
- Is output broadly maintained?
- Are customers receiving the same or better service?
- Is quality stable?
- Is work being completed within the intended hours?
- Are some teams or roles carrying an unfair share?
- Are workarounds returning?
- Which process changes are producing the gain?
Record operational changes made during the trial. Otherwise, improved results may be credited to the four-day week when they actually came from a redesigned intake process, a seasonal change or a new system.
Decide what success means before seeing the results
Set thresholds before the trial begins. They need not demand perfection, but they should protect customers, quality and people.
A decision might consider the trial viable when output and service remain within an agreed range, quality does not materially decline, overtime does not rise and employee experience improves. The exact thresholds depend on the organisation and should reflect normal baseline variation.
Also agree the response to mixed results. One team may be ready while another process needs redesign. A trial can reveal where the work must change without proving that the whole idea should be abandoned.
Treat external evidence as evidence, not a promise
The 2022 UK pilot involved 61 organisations and around 2,900 workers. It reported encouraging outcomes, including reductions in stress and burnout, and most participating businesses planned to continue. Its design used company data, employee surveys and interviews across several measurement points.
Those findings show that reduced working time can be practical in varied organisations. They do not guarantee the same result in every business. Your operating model, customer commitments, roles and starting conditions still matter.
A credible trial creates local evidence. It shows whether this organisation can return the day while maintaining the outcomes that matter.
Before changing the working week, map the work and establish the baseline. That gives the trial a fair test, and gives the gain somewhere explicit to go.