Effective Productivity Systems: What Works Best

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Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 31 July 2026 · corrected by Emir Baycan

   A review of the research and case-study section of this productivity systems article found that several specific statistics attributed to real researchers and companies could not be verified, and in a few cases the real source describes something different from what was cited. The section was rewritten to keep the real people, books, and organizations involved while removing the unverifiable specifics and adding accurate context where a real, related finding exists.

   What the page claimed

   The article attributed a Frontiers in Psychology study to Dominika Maison with a 67% vs 45% task-completion comparison, cited a GTD review by Heylighen and Vidal as appearing in the International Journal of Information Technology and Management, described Francesco Cirillo presenting outcome data at the XP2009 conference, cited specific estimation-error percentages from Staffan Noteberg's book, described David Anderson tracking 22 software teams with a 47% cycle-time reduction, and described a Dropbox 'Virtual First Toolkit' rollout and an Allen and Overy GTD pilot with specific participant counts and percentage outcomes.

   What was corrected

   The section now correctly identifies Heylighen and Vidal's 2008 GTD paper as published in Long Range Planning, notes that the specific Maison time-blocking study and the Cirillo/XP2009 and Noteberg estimation figures could not be verified, replaces the Anderson Kanban claim with the real, well-documented Microsoft XIT Sustaining Engineering case, describes Dropbox's real Virtual First model and Toolkit without the unverified statistics, notes that the Allen and Overy GTD pilot could not be verified, and reframes the Intel OKR case around Andy Grove and John Doerr's real, documented history rather than an unverified causal claim about the memory-to-microprocessor transition.

   Why: Web searches for each specific study, statistic, and case study in this section either turned up a different real source than the one cited, or returned no evidence the specific figures exist. Since the real people, books, and companies named are genuine and the general subject matter is accurate, the section was rewritten rather than removed, correcting the specifics while preserving the legitimate parts of each reference.

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