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Beyond Establishing the Four-Day Workweek: Understanding Adaptation and Long-Term Survival in an Agile Software Organization

Michael Neumann, Darja Šmite

arXiv:2609.13089v1cs.SE

TL;DR

Research has largely examined the four-day workweek’s introduction and short-term effects, leaving its long-term survival in agile software organizations less understood. This longitudinal single-case study examines the arrangement across time and finds that it evolved through adaptation and institutionalization before facing external and organizational pressures.

  • Problem

    Research has focused mainly on immediate 4DWW outcomes, while the long-term adaptation and survival of the arrangement in agile software organizations remain less understood.

    Source: §1 · p. 2, §5.1 · p. 12

  • Method

    A longitudinal single-case study examined the 4DWW lifecycle in one agile software organization across two interview phases more than three years apart.

    Source: §1 · p. 2, §3.1 · p. 4, §6 · p. 15

  • Results

    The 4DWW evolved from introduction through adaptation and institutionalization, then faced ownership change, economic downturn, market and AI pressure, and restructuring.

    Source: §5.1 · p. 12, §6 · p. 15

  • Takeaways & Limitations

    Under pressure, individual and team efforts to protect the arrangement contributed alongside organizational policies to its continued survival.

    Source: §6 · p. 15

    The two-interview overlap for double-coding was too small to estimate a stable inter-coder agreement coefficient.

    Source: §3.3 · p. 7

Abstract

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Context: Existing research on the four-day workweek (4DWW) has primarily examined its introduction and short-term effects, with limited understanding of its long-term survival or its interaction with agile software development. Objective: We study how a reduced-hour 4DWW is introduced, adapted, institutionalized, and sustained under changing organizational and external conditions in an agile software organization. Method: We conducted a longitudinal single-case study of a software organization operating a 32-hour, four-day week. The study draws on 15 semi-structured interviews in 2022 and 2026, analyzed using qualitative content analysis. Results: The 4DWW is better understood as an evolving arrangement than a one-off intervention. After the introduction, teams redesigned coordination, communication, meetings, agile practices, and iterations to adapt to reduced working time. Once institutionalized, the 4DWW faced ownership change, economic downturn, and market and AI pressures. Rather than reverting to five-day workweek, employees absorbed these pressures through voluntary protective adaptations, while anticipating that a rollback would harm job satisfaction, organizational commitment, and employer image. Contribution: We contribute longitudinal evidence on sustaining 4DWW in agile software development and propose two conceptual artifacts: a lifecycle model of the 4DWW and a 4DWW survival matrix, explaining how external pressures and management rationale rollback risk.

1 Introduction

Although interest in the four-day workweek has grown, its long-term adaptation and survival remain underexamined, particularly in agile software organizations using reduced rather than compressed hours. This study examines its introduction, institutionalization, and response to pressure over time.

1 Introduction

  • Prior research reports 4DWW associations with productivity, well-being, retention, and organizational performance, while practice interest also reflects talent competition and changing work norms.Empirical studies also report increased focus on high-value tasks and reduced meeting overhead.Source: §1 · p. 2
  • Agile software organizations may suit a 4DWW but also face coordination risks because time-boxed collaborative practices operate amid deadlines, workload, interdependence, and uncertainty.Reducing work to four days can affect coordination, synchronization, decision-making, and delivery cycles.Source: §1 · p. 2
  • Research has emphasized immediate post-introduction outcomes, leaving limited evidence on how established 4DWW arrangements adapt, institutionalize, and survive organizational change.The gap is especially relevant to reduced-hour arrangements and their response to pressure or possible return to a five-day week.Source: §1 · p. 2
  • The study examines a longitudinal agile-software case through questions about how the 4DWW is introduced and institutionalized and how it survives organizational and external pressures.The second question also considers protective responses and anticipated consequences of reverting to a five-day workweek.Source: §1 · pp. 2–3

2 Background & Related Work

Prior work describes varied 4DWW models and introductory challenges, but evidence on their long-term operation—especially in agile software organizations—remains limited.

2.1 The 4DWW Concept and Its Introduction

  • The 4DWW has a long history, but sustained international attention intensified in the past decade amid post-pandemic reassessments of working time and workforce expectations.Earlier US experiments at scale date to the 1970s, while European approaches then emphasized flexible hours rather than fewer weekly days.Source: §2.1 · p. 3
  • 4DWW models differ in whether hours are reduced or compressed, compensation is maintained, and days off are fixed or rotating; reported effects vary by model.The visible 100-80-100 variant combines unchanged pay and reduced hours with expected productivity equal to the prior five-day week.Source: §2.1 · p. 3
  • Introduction extends beyond the formal transition because lived team practices can diverge from policy, requiring organizational support and workflow adjustment.Prior work links managerial support and redesigned workflows to successful compressed-week introductions, though those schedules retain weekly hours.Source: §2.1 · pp. 3–4

2.2 The 4DWW in Software Engineering Organizations

  • Evidence on post-introduction 4DWW practice in software engineering is thin, and existing accounts leave long-term sustainability under changing conditions largely unexamined.The prior agile case was cross-sectional and soon after transition; a separate compressed-schedule case retained weekly hours.Source: §2.2 · p. 4
  • Two underexamined software-engineering issues are how recurring synchronous agile practices adapt without the fifth day and which organizational conditions sustain the 4DWW.This study addresses both with evidence collected at two points more than three years apart in one organization.Source: §2.2 · p. 4

3 Research Design

The study uses a longitudinal embedded case design and two interview phases to examine the 4DWW lifecycle in one software organization, while recognizing limits in construct validity, coding reliability, and generalizability.

3.1 Single Case Study & Context Description

  • The lifecycle of the 4DWW at pseudonymous company Pied Piper is the case, with employees, teams, and organizational functions serving as embedded units of analysis.The study examines conditions, practices, employee responses, and external pressures shaping introduction, adaptation, normalization, and sustainability.Source: §3.1 · p. 4
  • The study focuses on one German software development department and its interface roles in Italy within a worldwide online marketing company of about 1,450 employees.The software development sites are in Germany, Poland, Romania, and the United Kingdom.Source: §3.1 · p. 4

3.2 Data Collection & Analysis

  • The first phase included 10 semi-structured interviews in 2022 and the second included five in May 2026, with the later guide emphasizing longitudinal changes.The first phase covered agile roles and varied experience; its interviews averaged 45 minutes, versus 33 minutes in the second phase.Source: §3.2 · p. 5
  • Researchers applied Mayring-style qualitative content analysis, developing codes and categories before clustering them under research-question themes.The first phase was coded manually; the second used independent coding of disjoint subsets and double-coding of two overlapping interviews, alongside LLM consistency checks.Source: §3.2 · p. 6

3.3 Threats to Validity

  • The operationalization of survival testing and survival emerged inductively, creating a construct-validity concern despite two interview rounds and author discussions refining definitions.Survival testing means an established 4DWW is challenged by changing conditions; survival means it is maintained despite such pressures.Source: §3.3 · p. 6
  • Single-researcher coding in phase one introduced single-code bias, and concurrent market, AI, or reorganization changes were reported as co-occurring rather than causally attributed to the 4DWW.The study also relied on interviewees’ recollections of events.Source: §3.3 · pp. 6–7
  • Because the study covers one organization and 15 interviews, generalization is limited; the authors claim analytical rather than statistical generalization toward similar contexts.The authors identify agile-oriented organizations as a particularly relevant transfer context.Source: §3.3 · p. 7
  • The two-interview overlap and LLM consistency check were too small to yield a stable estimate of inter-coder agreement.The shared instrument core and analysis process supported cross-phase consistency.Source: §3.3 · p. 7

4 Results

The 4DWW was introduced gradually and reshaped everyday work before becoming embedded in organizational routines and employee expectations. Later economic, ownership, market, and customer pressures tested its survival, while employees made voluntary adaptations and anticipated costs from rollback.

4.1 Establishing the Four-Day Workweek

4.2 Long-Term Survival of the Four-Day Workweek

  • Economic downturn, ownership restructuring, market and AI disruption, and customer responsiveness pressures made survival less secure, especially in customer-facing functions.Interviewees said new owners and business realities were not bound by the original assumptions underlying the arrangement.Source: Survival testing under pressure… · pp. 10–11
  • Employees responded with voluntary protective adaptations, including longer days, temporary five-day periods, and greater personal responsibility for coordination and communication.Interviewees also described collective commitment and willingness to make personal sacrifices to retain the arrangement.Source: Protective adaptation · p. 11
  • Interviewees anticipated that rollback would harm satisfaction, motivation, organizational commitment, and corporate image, while increasing turnover intentions.Because the 4DWW was embedded in personal routines and career decisions, some viewed rollback as a fundamental change to the employment relationship.Source: Anticipated Rollback Effects · p. 11

5 Discussion

The discussion recasts the 4DWW as an evolving arrangement and explains its survival through organizational rationales and employee adaptation under pressure.

5.1 How Four-Day Workweek Evolves Beyond Implementation?

  • The 4DWW progresses through distinct phases rather than remaining a stable post-introduction state.The lifecycle model summarizes its evolution.Source: §5.1 · pp. 12–13, Figure 2 · p. 13
  • Piloting different schedules and monitoring product outcomes lowered perceived transition risk and helped secure leadership support.An unplanned half-day pilot and confidence in company performance data contributed to committed support.Source: §5.1 · p. 12
  • Adaptation involved deliberate coordination and communication practices, alongside changes to agile routines and iteration length.Examples include asynchronous communication, explicit handovers, intermittent pair programming, and one-week iterations.Source: §5.1 · p. 12
  • After roughly a year, the 4DWW became business as usual and shaped organizational identity and employee expectations.The study frames these expectations in employment relationships and recruitment, beyond commonly measured well-being and retention outcomes.Source: §5.1 · p. 13
  • Under economic and market pressure, employees and teams absorbed challenges through adaptive behaviors intended to preserve the institutionalized 4DWW.The authors describe this protective mechanism as an alternative to assuming that pressure directly leads to rollback.Source: §5.1 · p. 13

5.2 How Four-Day Workweek Survives?

  • The survival matrix distinguishes external pressure from the rationale for maintaining the 4DWW, from trust- and value-oriented to control- and output-oriented approaches.It describes different organizational trajectories, including maintenance, performance justification, and rollback pressure.Source: §5.2 · p. 13, Figure 3 · p. 14
  • With lower pressure, conditional adoption remains vulnerable to weak gains or shifting priorities, while cultural stability depends on organizational slack and genuine productivity improvements.Cultural stability aligns the arrangement with organizational values and employee expectations.Source: §5.2 · pp. 13–14
  • Under pressure, value-oriented organizations may rely on voluntary protective adaptation, while output-oriented survival depends on measurable performance benefits and faces greater rollback pressure.The matrix is proposed as a planning and early-warning tool for organizations assessing pressures and the rationale legitimizing the 4DWW.Source: §5.2 · pp. 14–15

6 Conclusion & Future Work

The conclusion draws on two interview phases in one agile software organization to examine how its 4DWW developed and faced pressure. It identifies individual and team efforts to protect the arrangement and calls for testing the proposed matrix beyond this case.

6 Conclusion & Future Work

  • The study follows one agile software organization through two interview phases more than three years apart.It examines introduction, adaptation, institutionalization, and sustainability.Source: §6 · p. 15
  • The 4DWW is an evolving arrangement whose survival under pressure involved individual and team efforts as well as organizational policies.The authors summarize these efforts as protective adaptation.Source: §6 · p. 15
  • Future research should test the matrix in other organizations, industries, reduced-hour variants, and geographically or culturally distributed settings.The durability of protective adaptation also remains open given participants' reported high workload.Source: §6 · p. 15
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