Sleeping with Your Smartphone
Sleeping with Your Smartphone: How to Break the 24/7 Habit and Change the Way You Work (Harvard Business Review Press, 2012) is the book through which Perlow introduced her BCG findings to the broader management audience and established the collective-intervention framework that has shaped organizational responses to connectivity for more than a decade. The title refers to the specific behavior Perlow found most diagnostic: the consultants who kept their phones on their nightstands, checking them before sleep and upon waking, had surrendered the final boundary that separated rest from work. The book traces the full BCG experiment from initial skepticism through iterative implementation to the surprising quantitative and qualitative results, making the case that structured disconnection is not a concession to worker wellbeing but a strategic enhancement of organizational performance.
In the AI Story
The book's central argument is structural rather than therapeutic. Perlow is not writing a wellness manual or prescribing individual mindfulness. She is documenting an empirical finding about organizational performance: teams that implemented collective disconnection outperformed teams that maintained continuous availability, measured by the same metrics the firm used to evaluate client work. This reframing was essential to the book's influence. By demonstrating that PTO improved work rather than merely protecting workers, Perlow gave organizations a reason to adopt the intervention that did not require them to prioritize wellbeing over performance.
The book also functions as a field guide to organizational experimentation. Perlow describes the specific sequence by which each BCG team designed, implemented, and adjusted its own version of the intervention, emphasizing that the details mattered less than the process: the team's shared commitment to trying a new way of working, observing results together, and adjusting based on what the experiment revealed. The methodology has been widely adopted in subsequent organizational-change work, and its principles anticipate the AI Practice frameworks now being proposed for teams working with generative tools.
The framework's relevance to AI-augmented work is direct and, in the simulation's argument, more urgent than its original application. The mechanisms Perlow identified — the cycle of responsiveness, the asymmetry of visibility, the structural impossibility of individual exit — operate in AI-era knowledge work with intensified force, because the source of the connectivity has shifted from external demand to internal desire. The interventions the book prescribes require adaptation, but the underlying principles hold.
Origin
The book emerged from four years of embedded fieldwork at Boston Consulting Group beginning in 2007, conducted initially as a partnership between Perlow and BCG's internal Talent Development organization. The early interventions were narrow trials in single offices; the book documents the progressive scaling of the experiment across multiple practices and geographies, and the institutional learning that made the scaling possible.
Key Ideas
The unit of analysis is the team. Individual solutions to collective problems do not work; the book is an extended demonstration of why and what to do instead.
Constraint as enhancement. Structured unavailability does not reduce output; it restructures output, replacing reactive fragmented work with proactive focused work.
Belief follows behavior. Cultural change proceeds through experiments whose results revise assumptions, not through arguments that attempt to revise assumptions directly.
Predictability is the load-bearing variable. The cognitive benefits of disconnection depend on its being scheduled in advance; unexpected breaks do not produce equivalent restoration.
Appears in the Orange Pill Cycle
Further reading
- Leslie Perlow, Sleeping with Your Smartphone (Harvard Business Review Press, 2012)
- Leslie Perlow, Finding Time: How Corporations, Individuals, and Families Can Benefit from New Work Practices (Cornell University Press, 1997)
- Cal Newport, A World Without Email (Portfolio, 2021)
- Leslie Perlow and Jessica Porter, "Making Time Off Predictable — and Required," Harvard Business Review (October 2009)