Entrée réelle
- Claims to audit
- C1: The four-day-week trial increased productivity by 20% and improved wellbeing for all employees. C2: It caused no customer-service decline. C3: Most organizations can adopt it without additional staffing.
- Evidence corpus
- S1 (2025 company report): one 80-person software company compared self-reported completed tasks during a 12-week voluntary pilot with the prior quarter; reported +20%; seasonal workload changed; no control group. Wellbeing survey: 61/80 responded, 49 reported improvement, 8 no change, 4 worse. S2 (2025 company support dashboard): median response 3.9h before and 4.1h during; target ≤4h; complaint count not supplied. S3 and S4 are news articles that both summarize S1 without new data. S5 (2024 cross-sector survey abstract): 38 organizations reported varied staffing changes; full methods unavailable; abstract does not report adoption feasibility.
- Evidence standard and use
- For a public guidance article. Labels: Supported, Partly supported, Unsupported, Contradicted, Unclear. Causal language needs a credible comparison; 'all/most' needs population evidence. Company reports may support observations about that pilot but not generalization. Evidence current through 31 December 2025.







